Question: Given there are five (05) sample taken. The sample mean (X-bar) are; 8.51, 8.18, 11.07, 10.03, and 10.23 respectively. Also, Range values for these 5

Given there are five (05) sample taken. The sample mean (X-bar) are; 8.51, 8.18, 11.07, 10.03, and 10.23 respectively. Also, Range values for these 5 samples are; 3.33, 2.61, 3.39, 4.39, and 6.49. If the upper control limit for X-bar chart is 12.55, what should be the most appropriate the sample size? Select one:
a. 5
b. 2
c. 4
d. 3

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