Find the mean (arithmetic) of following frequency distribution :
Weight (in kg) 60 61 62 63 64 65
No. of workers 5 8 14 16 10 7

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Solution

Let A = 63
Table of find arithmetic mean :
Arithmetic mean $(¯x)=A+∑fidi∑fi=63−frac2160=63−0.35=62.65$
Arithmetic mean = 62.59

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Find the mean (arithmetic) of following frequency distribution :Weight (in kg)606162636465No. of workers581416107

Let A = 63Table of find arithmetic mean :Arithmetic mean (¯x)=A+∑fidi∑fi=63−frac2160=63−0.35=62.65Arithmetic mean = 62.59

Find the mean (arithmetic) of following frequency distribution :
Weight (in kg) 60 61 62 63 64 65
No. of workers 5 8 14 16 10 7

Let A = 63
Table of find arithmetic mean :
Arithmetic mean $(¯x)=A+∑fidi∑fi=63−frac2160=63−0.35=62.65$
Arithmetic mean = 62.59