Question

find the mean by direct method 0-10 10-20 20-30 30-40 40-50 frequency 12 16 6 7 9​

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Statistics

Revision of Mean and Median

Calculate the mean of the f...

STATISTICS

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Asked on December 26, 2019 by

Aaroohi Dambal

Calculate the mean of the following distribution

CI 0-10 10-20 20-30 30-40 40-50

b 12 16 6 7 9

MEDIUM

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ANSWER

Class Interval frequency (fi) Mid value fixi

0-10 12 5 60

10-20 16 15 240

20-30 6 25 150

30-40 7 35 245

40-50 9 45 405

N=∑fi=50 ∑fixi=1100

∴Mean=

∑fi

∑fixi

=

50

1100

=22

solution