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Question

Find the mean of the following frequency distribution by the assumed mean method :
No. of apples50535356565959626265
No of boxes201501159520

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Solution

No.ofapples xi fi di=xiA fidi
5053 51.5 20 6 120
5356 54.5 150 3 450
565957.5=A115 0 0
5962 60.5 95 3 285
6265 63.5 20 6 120
fi=400 fidi=165
Mean(¯¯¯x)=A+fidifi

=57.5165400

=57.50.4
=57.1

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