Q. 54.6( 45 Votes )

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Answer :

Given is the frequency distribution table for ungrouped data.

We have

To find arithmetic mean of school wise savings in each mandal,

A common formula is:

In ‘Amberpet’:

Mean = Rs 359

In ‘Thriumalgiri’:

Mean = Rs 413

In ‘Saidabad’:

Mean = Rs 195

In ‘Khairathabad’:

Mean = Rs 228

In ‘Secundrabad’:

Mean = Rs 200

In ‘Bahadurpura’:

Mean = Rs 837

For arithmetic mean of savings of all the school:

Mean of such ungrouped data is given by

Mean = 444

Thus, arithmetic mean of savings of all the schools is Rs 444.

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