Question: In statistical process control, the hourly samples are taken. The sample means are: 156.46, 199.62. 189.31, 102.22 and 112.09 respectively. Also, the ranges of these

In statistical process control, the hourly
In statistical process control, the hourly samples are taken. The sample means are: 156.46, 199.62. 189.31, 102.22 and 112.09 respectively. Also, the ranges of these samples are 11.97. 12.17.13.94 11.86, and 11.83 respectively. If the upper controllimit of X-bar chart is 157.87, what is the sample size of each sample? O a 7 b. 6 Oc 5 d. None is correct e 4

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