Frequency table worksheet pdf Using your answer to question 2, write down a formula involving for the mean in Using Two-Way Frequency Tables to Compute Conditional Probabilities •In Math 1 you learned how to put data in a two-way frequency table (using counts) or a two-way relative frequency table (using percents), and use the tables to find joint and marginal frequencies and conditional probabilities. Free trial available at KutaSoftware. No Feb 24, 2016 · Explain 1 Constructing Two-Way Frequency Tables If a data set has two categorical variables, you can list the frequencies of the paired values in a two-way frequency table. The results are shown in the below frequency table. FREQUENCY TABLES – PRACTICE QUESTIONS CALCULATOR ALLOWED 1. Find the P(E|D) Given the following table of grades from Mrs. org 4 4 The accompanying table shows the weights, in pounds, for the students in an algebra class. These temperatures are shown below. Frequency 47x6 For the above frequency distribution, find the largest and smallest possible values of x such that the median is 6. REGENTS WORKSHEETS: Regents-Frequency Tables 1 IA/A one-way: 3/1: TST PDF DOC: Regents Mean from a Frequency Table Video 54 on www. 04 Democrat {D} 0. The document contains 6 multi-part questions involving frequency tables and conditional probabilities. A frequency table records the frequency of anything within a class boundary. 1: Frequency Histograms 2 Name: _____ www. Why are frequency tables important? Frequency tables help us: Organise data: Group data into categories or intervals. Click on the worksheets to go to the download page. 73. {6,5,4,5,0,7,1,5,4,4,3,2,2,3,2,4,3,4,0,7} Complete the frequency table below for these data. An answer key is provided to check responses. You can find a conditional relative frequency using a row total or a column total of a two-way table. 554 joint frequency, p. (2) "(b) Compare the times taken by the 100 girls and 100 boys. Two-way table worksheets is a way to display frequencies or relative frequencies for two variables in a tabular format. com Frequency 28 Frequency Question 1: (a) Money Withdrawn £10 £20 £30 £40 £50 £60 Construct a frequency distribution with 10 intervals of 1. In worksheet on frequency distribution the questions are based on arranging data in ascending order or descending order and constructing the frequency distribution table. The questions require organizing and summarizing numerical data in Title: Mode Range Frequency Table Created Date: 10/9/2024 8:58:17 AM The incomplete frequency table below shows the number of apples harvested from 80 apple trees in an orchard. çorbett. Fill in the frequency table with two possible values. The table shows the results Work out the relative frequency of throwing: Averages from a Frequency Table Practice Strips (Editable Word | PDF | Answers) Mean from a Frequency Table Fill In The Blanks (Editable Word | PDF | Answers) This worksheet is designed to provide practice of finding the different averages and ranges form a discrete data frequency table. a 16 b 40 c 24 d 6 6 Calculate the relative frequency for each of these numbers if the total frequency is 40. b) Annie decides to use a grouped table. The relative frequency is calculated using the formula: Relative frequency = number of times an event has occured number of trials 4. 8. A high school’s administration asked 100 randomly selected students in the 9th and 10th Free frequency table worksheets for 1st Grade to 8th Grade. !Alex works for the council. 5: Frequency Tables 2 Name: _____ www. Frequency Tables. Using the data, complete the cumulative frequency table and construct a cumulative frequency histogram on the grid below. Question 2: The histogram shows information about the temperatures in various locations. Title: document1 Averages from a grouped frequency table Worksheet Q1. Want worksheets on more than 50 other topics? Printable Tally Chart worksheets Here you find our free grade 2 and 3 tally chart worksheets. 3. Median and mode from frequency tables Starter 1. Label these columns as value, tally, and frequency. Practice. Jul 21, 2022 · I (when I say "I", I really mean "students") needed some practise on tally/frequency tables and this is what I came up with. Grade 3- Dot Plot and Frequency Tables 3(8)(A) Data analysis. joint frequency READING A two-way table is also called a contingency table, or a two-way frequency table. The two-way table shows some information about their answers. 2 Answers 1. Write your answer as a fraction in simplest terms. !Here are his results. Number of problems 2 problems 3 problems. FREQUENCY TABLES TOTALS AND THE MEAN Ref: G631. How many times was the bus late? Question 7: Katie rolls a dice 100 times. What is the probability that a randomly selected student got a A or B? 4. Find relative and conditional relative frequencies. Add to it a relative frequency column and a cumulative relative frequency column. There are three tables to complete: firstly a simple tally/frequency, secondly the students must fill in the categories and thirdly a grouped frequency table (on the other side of the worksheet as a mini extension). Answer the questions below, regarding this table. (1 mark) Use your graph to determine the median. Two Way Table Worksheets. # of Children Tally Marks com for more worksheets" Class Tally Marks Frequency 0 4 1 6. In Example 1, the relative frequency of students who own a cell phone who also own an MP3 player is _57 78 or about 0. The document provides a worksheet with questions on frequency distribution, mean, median, and mode. It is adding the class limits and divide by 2. (For example, to calculate the relative frequency of men in Cambridge who walked to work, divide 8,981 by 23,014. Each worksheet contains 10 skills based practice questions and 5 applied questions. SOLUTION Create a new column and a new row for the marginal frequencies. Frequency Adverb 100% always 95% almost always 80% usually, often, frequently 50% sometimes, occasionally 20% not very often, seldom 10% rarely 5% almost Elementary Statistics Making Frequency Table To make a Frequency Distribution Table , we first need to find its Class Width . com Question 1: There are 30 students in a class. Hardcase’s English classes: 3. 1. . Mean = 51/30 = 1. two-way table, p. There are also frequency table worksheets based on Edexcel, AQA and OCR exam questions, along with further guidance on where to go next if you’re still stuck. Committed to improving learner outcomes with teacher-centric digital support. A frequency table tells us how many of each value there are. This document contains the results of a 60-item test taken by a class. Then add the entries in each row and column. They could choose Jazz or Rock or Classical or Folk music. Feb 18, 2016 · 5. When working with frequency tables, recall this fundamental fact: A frequency table is a relative frequencies to the relative frequency for the current row. Number of apples Frequency Cumulative Frequency 0 ≤ x < 200 8 200 ≤ x < 400 22 400 ≤ x < 600 28 600 ≤ x < 800 76 800 ≤ x < 1000 80 Example: The following table gives the frequency distribution of the number . Create a frequency table. Interpret relative frequencies in the context of the data (including joint, marginal, and conditional relative frequencies). 7, P(E) = 0. Adverbs of frequency come after the verb “to be. This is a free printable / downloadable PDF worksheet with practice Feb 19, 2021 · Grouped Frequency Tables 739584 worksheets by Lee-Anne Lewis . To create a relative-frequency two-way table for all 50 people, divide each number in each cell by 50 Complete the frequency table for the car colours Colour Blue Red Yellow Green Black White Frequency [1] Tally charts and frequency tables Name: Class: Date: Relative Frequency – the frequency of a particular category divided by the sum of all the frequencies; expressed as a percent or decimal. Relative frequency is the ratio of the value of a subtotal to the value of the total. I sometimes wear a tie to work. Find the value of in the table. Students will calculate relative frequencies using experimental data and then use the relative frequency to answer questions regarding the given data. "The frequency polygon shows the time taken for 100 boys to solve a maths "question. doc / . Count occurrences: Tally how often each value or range appears. 10 Suppose a voter is chosen at random. 5) Below is a table of people in the park and the activities that they do. Example 1 Complete a two-way relative frequency table from the data in a two-way frequency table. Use the data on the previous page to complete the table. First, complete the table. m. Agenda: Discoveries. The relative frequency is used to estimate the probability of an event. maths. Question 2: The frequency table shows the piano grade of 17 students in a class. Our picture or tally graphs are great for math class, online math instruction or homeschooling. 12 0. F Regents Exam Questions S. com Worksheets, Interactive Quizzes and Exam Solutions A1 The table shows information about What are frequency tables? Well, before we get into this business, we need to understand what frequencies are, and then we can move to frequency tables. of orders received each day during the past 50 days at the office of a mail-order . Find the mean for the data in this frequency table (you may wish to draw another column and another row to aid the calculation). The results of the poll are summarized in the table below. - I can construct relative frequency tables for two way frequency tables. Identify the joint relative frequencies and the marginal relative frequencies. 2 Practice: Two-Way Tables and Conditional Probability 1. Use two-way tables to recognize associations in data. Find the P(D|E) 2. Mean = 50/25 = 2 Median = 2 Mode = 1 Range = 4 2. com. (a) Complete the frequency table. Jan 20, 2015 · This website and its content is subject to our Terms and Conditions. !The table below shows this information. •Let’s look at some examples to review this. 555 Previous conditional probability Core VocabularyCore Two-Way Frequency Tables 1. We will list the numbers of bottles of water we drank in a day over the course of 5 days. txt) or read online for free. com for more worksheets" Class Tally Marks Frequency 1 15 2 16 Complete the frequency table below using the data in the frequency histogram shown. sum of all the frequencies frequency of a particular category 5. !He records the number of people in cars travelling down a street over one hour. Step 1: Construct a Frequency Table - Start by constructing a frequency table with three columns. B. 4) The scores on a mathematics test were 70, 55, 61, 80, 85, 72, 65, 40, 74, 68, and 84. Interval Frequency Cumulative A frequency table is a list of objects with the frequency of each item shown in the table. (Review of last lesson) The numbers are arranged in ascending order. 555 marginal relative frequency, p. The results of this survey are shown below. Frequency Distribution Table Worksheet - Free download as Word Doc (. Objectives: - I can analyze two way frequency table for two categorical data. 24 Independent {I} 0. docx), PDF File (. The student applies mathematical process standards to solve problems by collecting, organizing, displaying, and interpreting data. The response of 20 students on whether or not they own an iPhone and whether or not they won an iPad is shown in the table below. _57 78 A two-way table can show relative frequencies for rows or for The grouped frequency table gives some information about weights. 3. Tables & Frequency Diagrams Worksheet. Nov 12, 2020 · Frequency Table 497211 worksheets by Lee-Anne Lewis . 13 reviews Year 2 Times Tables Worksheets PDF Pack We can summarize the information above in the following frequency table: Value Frequency 0 27 1 96 2 58 3 54 4 18 5 7 Now this table conveys everything that was significant about the distribution of data that we presented at the beginning of this example. ” (am, is, are, was, were) FREQUENCY TABLES SOLUTIONS GCSE (+ IGCSE) EXAM QUESTION PRACTICE IGCSE EXAM QUESTION PRACTICE DATE OF SOLUTIONS: 15/05/2018 MAXIMUM MARK: 66 1. (3)!(b) Neil says the relative frequency after 50 spins is 0. Colour Frequency White 12 Black 7 Red 6 Blue 4 Yellow 1 (a) How many cars were white? (b) How many cars were in the car park in total? the data, complete the cumulative frequency table and construct a cumulative frequency histogram on the grid below. Miss Williamson knows that the median shoe size is 5. Grouped Frequency Tables worksheet LiveWorksheets LiveWorksheets transforms your traditional printable worksheets into self-correcting interactive exercises that the students can do online and send to the teacher. 10 Twenty students were surveyed about the number of days they played outside in one week. "The table shows the times taken by 100 girls to answer the same question. Recognize possible associations and trends in the data. Answer sheet Include answer sheet. (Note that we lose some information from our original data set by separating the data) Eye Color # of Students (Category) ( Frequency) Blue 4 Brown 6 Gray 2 Hazel 5 Green 3 Total 20 # Pets # of Students This worksheet on Grouped Frequency Tables offers a comprehensive introduction to constructing and interpreting grouped data. 16°C 15°C 14°C 16°C 15°C 16°C 16°C 17°C 17°C 15°C 16°C 17°C 14°C 12°C Copy and complete the frequency table for these temperatures. The students were asked how many hours they spent playing video games in one week. Lesson 2: Two way frequency and relative frequency . Name: Exam Style Questions Ensure you have: Pencil, pen, ruler, protractor, pair of compasses and eraser You may use tracing paper if needed Guidance !The spinner is spun and the frequency the letter A is recorded every 10 spins. Students with Curfew Students with No Curfew TOTAL Students with Chores Students with . Marginal Relative Frequencies are found by adding the joint relative frequencies in each row and column. Peter and Paul were playing golf. Tes Global Ltd is registered in England (Company No 02017289) with its registered office at Building 3, St Paul’s Place, Norfolk Street, Sheffield, S1 2JE Chapter 9 — Relative frequency and probability 269 5 Calculate the relative frequency for each of these numbers if the total frequency is 48. Frequency Table worksheet LiveWorksheets LiveWorksheets transforms your traditional printable worksheets into self-correcting interactive exercises that the students can do online and send to the teacher. The questions involve arranging data in ascending and descending order, constructing frequency distribution tables, calculating measures of central tendency, and identifying the mode. A. Complete the relative frequency table below, based on the total participants. Notes: TWO-WA TABLES – ALKING AN IKING TO ORK TEACHER VERSION Part 2 – Calculate Relative Frequencies Calculate the relative frequencies for Tables 1 and 2 by dividing the value in each cell by the total for that table. A worksheet where you need to find the mean, mode, median and range from a frequency table. k = 1 + 3,3 log n = 1 + 3,3 log 40 = 1 + 5,29 = 6,29 This means we can have a table with 6 or 7 classes. "(a) Draw a frequency polygon to show this information on the diagram above. 26 0. Question 2: Aidan plays 50 games in an arcade. 3 worksheets, each with 15 frequency table questions targeting the skills and knowledge needed in 1st to 3rd Grade, 4th to 5th Grade, and 6th to 8th Grade Make two-way tables. The relative frequency of the bus being late is 0. 0 hours is evidence of unsatisfactory performance, does it have a major or minor problem with performance in this particular store? Frequency Table or Frequency Distribution Example: Data Set 1 Here are frequency distributions for the data on eye color and number of pets owned. Age For Against No Opinion 21-40 30 12 8 41-60 20 40 15 Over 60 25 35 15 TWO-WAY FREQUENCY TABLES A frequency table is a table that lists items and the number of times they occur in a data set. ” Examples: We usually eat breakfast at 7:00 a. Section A presents scenarios involving grouped frequency data, such as pupils' heights and runners' race times. Calculate the mean. Mean from a Frequency Table Video 54 on www. 2, and P(D and E) = 0. (1 mark) Carefully copy the cumulative frequency histogram into your writing booklet. Here we will learn about frequency tables, including what a frequency table is and how to make a frequency table. 45 KB pdf, Students have to find the total or the mean from both discrete and grouped frequency tables. This resource provides blank frequency table templates, a useful tool for organising and summarising data in statistics. The table below shows the political affiliation of American voters and their positions on the death penalty. 1 Optional Collaborative Classroom Exercise Exercise 1 In your class, have someone conduct a survey of the number of siblings (brothers and sisters) each student has. jmap. Frequency Tables Two-way tables can help identify and compare probabilities for non-numerical data, such as the probability that girls will Median from a Frequency Table Video 51 on www. Adverbs of Frequency Adverbs of frequency (also known as frequency adverbs or adverbs of time) answer the question how often. 2. # Words Frequency Create your own worksheets like this one with Infinite Algebra 1. The frequency of the number of any object or the number of occurrences of any event is plotted on a frequency table. com Question 1: A teacher asked his class how long they spent revising for a test, to the nearest hour. Complete the accompanying table, and use the table to construct a frequency histogram for these scores. 7 Median = 1. Notes Calculating the averages from a frequency table is more complicated than from a list of values. pdf), Text File (. Weight (kg) Frequency 0 < w 1 8 1 < w 2 10 2 < w 3 21 3 < w 4 19 4 < w 5 13 5 < w 6 9 (b) On the grid opposite draw a cumulative frequency graph for this information. On the cumulative frequency histogram you have copied draw a cumulative frequency polygon (ogive) for this data. Frequency Tables & Bar Graphs Revision Exercise 1) During a two-week period the temperature in Perth is noted each day. We will also look at how they can be used to help analyse a set of data. corbettmaths. ID: A 1 S. One category of data is represented by rows, 1. 24 0. Standard deviation from frequency tables Starter 1. iPhone No iPad 2. Make sure you are happy with the following topics before continuing. Joint Relative Frequencies are the values in each category divided by the total number of values. the 16th student’s time represents the median. Summarize categorical data for two categories in two-way frequency tables. It tells what portion of the total has a specified characteristic. Adverbs of frequency come before the main verb if the main verb is not “to be. A survey on favorite type of rock music and gender was conducted. So, when talking about frequency tables, we can say that it is a table that enlists or shows the events, items A two-way table can also show relative frequencies. The results are shown in the table. Find and interpret the marginal frequencies for the two-way table above. 5 minutes Worked Solutions: Included Note: Each question has designated marks. Adverbs of frequency tell how often something happens. B. Students with Curfew Students with No Curfew TOTAL Students with Chores Students with May 2, 2021 · Frequency-Tally Tables 966030 worksheets by Valerie King-Roberts . 85 90 Step 2: Determine number of class (k), using Sturgess Rule, n=total number of data. Hole 12345678 9 otal T Peter 3 2 5 7 3 2 2 4 17 45 Paul 4 4 6 8 3 3 2 6 6 42 7 The frequency table shows the time taken for 100 people to travel to an event. 554 joint relative frequency, p. Relative Frequency Video 248 on Corbettmaths Question 6: Esme takes the bus to university 40 times during a term. a 4 b Enter the data in the following table by tally marks and note the frequency. Regents Exam Questions S. Worksheet by Kuta Software LLC SATPREP Assignment: Mean, Median and Mode of Frequency table Name_____ Date_____ Find the mode, median, and mean for each data set. Andrea went to a car park and counted the colours of each of the cars. These worksheets offer user-friendly and comprehensive questions that will help students to solve and understand the working of a two-way table. Jazz Rock Classical Folk Total Men 12 19 4 52 Women 23 Total 21 11 100 (a) Complete the two -way table. By calculating the mean, compare the amount of time the boys and girls spent revising. 1) Goals Frequency 3 7 5 2 6 2 7 3 10 1 Goals in a Hockey Game 2) Goals Frequency 3 6 5 7 6 1 7 2 Goals in a Hockey Game 3) # Awards Frequency 1 1 3 1 4 2 5 2 6 1 7 4 The frequency of each bar is shown on the vertical axis. [Edexcel, 2013] Frequency Distributions (Totals and Averages) [3 Marks] Conditional Probability Worksheet Given the following information: P(D) = 0. This Relative Frequency Worksheet is great for practicing relative frequency. 8! Explain why Neil must be wrong A marginal relative frequency is the sum of the joint relative frequencies in a row or a column. The scores on the first nine holes are shown in the table below. Creating a Relative Frequency table based on TOTAL people. 555 conditional relative frequency, p. Enter the data in the following table by tally marks and note the frequency. 5: Frequency Tables 1 Answer Section 1 ANS: 4 REF: 060401a 2 ANS: 3 25−18 =7 REF: 060822ia 3 ANS: 3 REF: 061230ia 4 ANS: If there are 31 students. A conditional relative frequency is the ratio of a joint relative frequency to the marginal relative frequency. We need to be able to construct a frequency table and know how to interpret and use one to solve problems, such as calculating the mean, median, mode and range of the data. Our dad never gets off work before 6:00. (3 ) (b) Write down the modal class interval. Finding and Interpreting Marginal Frequencies A two-way table is a frequency table that displays data collected from one source Solutions for the assessment Simple probability - two way tables and frequency tables 1) P(female and got a grade B) = 19 88 2) P(is male) = 38 59 3) P(got an A) = 17 49 This resource is perfect for teachers providing practice in making frequency tables. Benefits of Two Way Table Worksheets Frequency Table Templates. !(a) Complete plot the relative frequencies on the graph below. Weight (kg) Cumulative Frequency 0 < w 1 0 < w 2 0 < w 3 0 < w 4 0 < w 5 0 < w 6 Jul 3, 2018 · pdf, 449. Therefore, 8 students in total scored above 40. Two-Way Frequency Table Worksheet 1. 16 Top "Frequency Table Worksheet" Teaching Resources curated for you. Create a frequency table from the data. A two-way frequency table is useful for displaying bivariate categorical data. To create a histogram, first complete a frequency table to show the number of values in intervals of TWO-WAY FREQUENCY TABLES A frequency table is a table that lists items and the number of times they occur in a data set. ID. Section A requires learners to find the mode and median, section B requires the mean and range. Converting to a Relative Frequency Tables The results of a poll of 100 adults about their favorite sport are shown in the two-way table below Two-way Frequency Table Worksheet Name: 1. The relative frequency, usually expressed as a decimal, is a fi gure that represents how often an event has occurred. . Frequency is the number of times an event or a digit repeats in the unit of time. The questions analyze data about topics such as preferences for snowboards vs skateboards, support for minimum wage increases by age, comic book readership by gender, recycling habits by age, savings account ownership vs employment status, and examples of qualitative vs quantitative data. Likes Skateboards Do not like Skateboards Total Likes Snowboards 15 12 27 A marginal relative frequency is found by dividing a row total or a column total by the grand total. Since there are 25 students in total, of which 8 scored higher than 40, we can write this as the following fraction: 6. The table shows how many tickets he won in each game. The student is expected to summarize a data set with multiple categories using a frequency table, dot plot, pictograph, or bar graph with scaled intervals. 3 new students, who are all Grade 6, join the class. 11 15 32 26 18 12 5 26 35 8 22 28 31 20 17 10 20 18 24 41 a) Tom tries to put the data into an ungrouped frequency table. If the management believes that more than 6. 0 hours from the table of data. Finding and Interpreting Marginal Frequencies A two-way table is a frequency table that displays data collected from one source that belong to two different categories. She makes the following Complete the frequency table. The table to the right is an example of a two-way frequency table that shows the number of students who prefer art, band, or chorus at Clayton High School. (Total for question 7 is 5 marks) Time (minutes) Frequency 0 < t 10 14 10 < t 20 16 20 < t 30 23 30 < t 40 29 40 < t 50 12 50 < t 60 6 (a) Find the percentage of people that travelled for more than 30 minutes to the event Adverbs of Frequency Fun rammar essons 1 Grammar Notes cont. (Review of last lesson) Find the interquartile range for these data values: 2. 9852 - 1 - Page 2 We can see from the frequency table that 5 students scored between 41 and 50 marks and 3 students scored between 51 and 60 marks. Joint Frequencies Here are the steps to create and use a frequency table to better understand and explain your data. Example 1 Complete the two-way frequency table. If we have collected a lot of data, we might display it in a frequency table. The results are show in the two-way frequency table. Time spent Frequency 0≤𝑡 Find the mean, mode, median and range from a frequency table. Also, have a look at our wide range of worksheets that are specifically curated to help your students practice their skills related to Mean, Median, and Mode . The table shows the amount of time in hours spent on homework during a week. 554 marginal frequency, p. !(a) Work out the total number of cars that travelled down the street. Arrange the following data in ascending order. In general, the term frequency refers to the quantity or amount of something or the number of times an event has occurred. Favor {F} Oppose {O} Republican {R} 0. Temperature (°C) Tally Frequency Two Way Frequency Tables & Independent/Dependent Events Two-way frequency tables are used to examine the relationships between two _____ variables. Write your answer as a percentage. The two-way frequency table, shown below, displays the data collected from a random group of high school students regarding whether they "liked" snowboards and/or "liked" skateboards. It's also valuable for students needing extra practice or for parents helping with maths homework. Frequency-Tally Tables worksheet LiveWorksheets LiveWorksheets transforms your traditional printable worksheets into self-correcting interactive exercises that the students can do online and send to the teacher. 15. Practice A Two-Way Frequency Tables Two-Way Table is a useful way to organize data that can be categorized by two variables. Number of hoops scored Tally Frequency 0 0 1 0 2 0 3 0 4 0 5 1 Give two reasons it might not be good to use ungrouped data. If the mean of the numbers is equal to the median, find . How do we find the Class Width? Here are some steps that we need to take: 1 Sort the raw data 2 Find the minimum and maximum value of the raw data 3 Find the range, Range= Max−Min 4 Find class width, CW = Range WORKSHEET ­ General 2 Mathematics Topic Areas: Probability PB1 Relative Frequency and Probability ­ Fundamental understanding ­ Single stage events ­ Relative Frequency Teacher: PETER HARGRAVES Source: HSC exam questions Exam Equivalent Time: 58. Bob asked 100 adults which one type of music they enjoyed. 1S1 © 2018 Maths4Everyone. 5 (lies between 1 and 2) Mode = 1 Range = 4 3 The frequency table shows the weight, in kg, of some cats. org 3 8 A public opinion poll was taken to explore the relationship between age and support for a candidate in an election. Solution: X is the midpoint of the class. Ready-to-use mathematics resources for Key Stage 3, Key Stage 4 and GCSE maths classes. company. Question 3: The histogram shows information about the salaries of workers in a company. Example: This histogram shows the number of students in Simpson’s class that are in each interval. Weight (w grams) Frequency 50 w < 60 5 60 9w < 70 70 w < 80 22 80 w < 90 27 1790 w < 100 (a) Work out an estimate for the mean weight of the pebbles. - I can analyze data by calculating the percentages and relative frequencies of different events in the study. ndryal xhbf pifc oomqhq nyek nsdfd mokzdjju cdr unra nmyj yhqygi hqjykqg cxtnhl umclrkqe juqo