A cricket ball manufacturing company wants to check the variation in the weight of the
balls. For this, 25 samples each of size 4, are selected and the weight of each ball is
measured (in grams). The sum of the sample average and the sum of
Sample ranges were found to be ∑ X
25
=1 = 4010
Grams and ∑
25
=1 = 72 grams , respectively.
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