To determine To construct: The extended frequency distribution for the set of numbers and calculate the mean for the grouped data. Explanation Given: The data of frequency distribution is given as follows: ( 245 , 106 , 112 , 321 , 235 , 209 , 263 , 215 , 168 , 350 , 340 , 401 , 179 , 433 , 286 , 141 , 358 , 468 , 166 , 498 , 341 , 171 , 119 , 362 , 264 , 325 , 225 , 391 , 133 , 127 ) Procedure used: “Steps for constructing the frequency distribution: 1. Define the classes using the class width. 2. For each of the class place the tally marks, if the data value is in the class interval. 3. Count the number of tally marks for each class interval for obtaining frequency. Steps for finding mean of grouped data: 1. Calculate the midpoint by finding the mean of the endpoints of the class. This is denoted by M . 2. Multiply the each of the frequency F with the corresponding midpoint M for each of the class. These values are denoted as ‘Product, FM ’. 3. Calculate the sum of the frequencies which is denoted as n . 4. Calculate the sum of ‘Product, FM ’. 5. Divide the sum of ‘Product, FM ’ with the sum n . Calculation: Note that, all the class intervals are defined with the width of 49. Place the tally marks for each of the data value within the interval. Count all the tally marks for frequency of each class. The frequency distribution is, Class Tally Frequency, F 100–149 | | | | | 6 150–1

10th Edition

ISBN: 8220100803055

Author: SAUNDERS

Publisher: PEARSON

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Chapter 12.2, Problem 2BE

To determine

To construct: The extended frequency distribution for the set of numbers and calculate the mean for the grouped data.

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Chapter 12.2, Problem 1BE

Chapter 12.2, Problem 1CE

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