Answer to Question #203673 in Statistics and Probability for pooja

Question

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 Σxi25𝑖=1=4010 Grams and Σ𝑅𝑖25𝑖=1=72 grams, respectively. Computer the control limits for the X and R-charts. It is given that A2 = 0.729, D3 = 0 and D4 = 2.282.

Answer 1

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