A. Choudhury\'s bowling ball factory in Illinois makes bowling balls of adult si

Question

A. Choudhury's bowling ball factory in Illinois makes bowling balls of adult size and weight only. The standard deviation in the weight of a bowling ball produced at the factory is known to be 0.33 pounds. Each day for 24 days, the average weight, in pounds, of 9 of the bowling balls produced that day has been assessed as follows: Average (lb.) Average (lb.) Average (lb.) Average (lb.) Day 13 14 Day 19 20 Day Day 13.5 13.5 13.7 15 13.6 21 13.6 14.1 13.5 13.7 13.5 13.6 13.7 14.2 14.4 14.2 13.7 14.2 13.6 13.9 16 17 13.5 13.7 14.2 10 13.9 13.6 14.1 23 24 12 a) Establish a control chart for monitoring the average weights of the bowling balls in which the upper and lower control limits are each two standard deviations from the mean. What are the values of the control limits? Upper Control Limit (UCLlb. (round your response to tvo decimal places). b. round your response to two decimal places Lower Control Limit (LCL,- b) If three standard deviations are used in the chart, what are the values of the control limits? Upper ControlLimit (UCLb (round your response to tivo decimal places) Lower Control Limit (LCL 1b. (round your response to two decimal places) Click to select your answer(s).

Explanation / Answer

Answer:

Mean = 13.8

2 sigma lower limit = mean - 2 sigma = 13.800- (2*0.287) = 13.226

Answer:

Mean = Sum of all Xi / N Mean = 331.200 / 24

Mean = 13.8

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