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Calculate the mean of the following series. Weekly wages (Rs.) Below 20 20-50 50-90 90-140 Above 140 No. of workers 10 20 40 15 15 Now in the above example the magnitude of the second class interval is 30, of the third class-interval 40, of the fourth interval 50 which means that each time the magnitude is rising by 10. On this assumption the magnitude of the first class would be 20 and of the last class 60. The class-intervals would then be as follows. 0-20, 20-50, 50-90, 90-140, 140-200 With these class-intervals mean would be calculated as follows :

Calculate the mean of the following series. Weekly wages (Rs.) Below 20 20-50 50-90 90-140 Above 140 No. of workers 10 20 40 15 15 Now in the above example the magnitude of the second class interval is 30, of the third class-interval 40, of the fourth interval 50 which means that each time the magnitude is rising by 10. On this assumption the magnitude of the first class would be 20 and of the last class 60. The class-intervals would then be as follows. 0-20, 20-50, 50-90, 90-140, 140-200 With these class-intervals mean would be calculated as follows :

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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If howerer in the open end series the given class-intervals are not equal then there is some difficulty in deciding the limits of the open end classes. The limits have to be assumed on some rational basis. following example would illustrate the point : The Calculate the mean of the following series. Weekly wages (Rs.) Below 20 20-50 50-90 90-140 Above 140 No. of workers 10 20 40 15 15 Now in the above example the magnitude of the second class interval is 30, of the third class-interval 40, of the fourth interval 50 which mear that each time the magnitude is rising by 10, On this assumption the magnitude of the first class would be 20 and of the last class 60. The class-intervals would then be as follows. 0-20, 20-50, 50-90, 90-140, 140-200 With these class-intervals mean would be calculated as follows: Weekry wages Rs. No. of workers Mid-values Dev. from Step Dev.
Transcribed Image Text:If howerer in the open end series the given class-intervals are not equal then there is some difficulty in deciding the limits of the open end classes. The limits have to be assumed on some rational basis. following example would illustrate the point : The Calculate the mean of the following series. Weekly wages (Rs.) Below 20 20-50 50-90 90-140 Above 140 No. of workers 10 20 40 15 15 Now in the above example the magnitude of the second class interval is 30, of the third class-interval 40, of the fourth interval 50 which mear that each time the magnitude is rising by 10, On this assumption the magnitude of the first class would be 20 and of the last class 60. The class-intervals would then be as follows. 0-20, 20-50, 50-90, 90-140, 140-200 With these class-intervals mean would be calculated as follows: Weekry wages Rs. No. of workers Mid-values Dev. from Step Dev.
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