Sample mean-variance and standard deviation for grouped data


You're given the following frequency distribution for number of errors 55 students made in the test

Errors Frequency
0-2 11
3-5 14
6-8 9
9-11 4
12-14 7

 Find out:

a) mean,

b) variance

c) standard deviation.

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Basic Statistics: Sample mean-variance and standard deviation for grouped data
Reference No:- TGS022306

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