RJ produces chocolate balls. There are five samples, and each sample contains 4 packs of chocolate balls that were randomly selected and weighed. The following is the sample data:   Weight (lb) Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Pack 1 0.94 1 1.05 0.98 0.93 Pack 2 1.15 0.93 1.13 0.93 0.8 Pack 3 0.88 1 1.07 0.9 1.12 Pack 4 0.96 1.06 0.97 0.89 1.01   Suppose the standard deviation is unknown, and the X-bar chart is based on 3-sigma limits. Based on the sample data, what is LCL?  a   0.920 b   0.887 c   0.816 d   0.844

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RJ produces chocolate balls. There are five samples, and each sample contains 4 packs of chocolate balls that were randomly selected and weighed. The following is the sample data:

 

Weight (lb) Sample 1 Sample 2 Sample 3 Sample 4 Sample 5
Pack 1 0.94 1 1.05 0.98 0.93
Pack 2 1.15 0.93 1.13 0.93 0.8
Pack 3 0.88 1 1.07 0.9 1.12
Pack 4 0.96 1.06 0.97 0.89 1.01

 

Suppose the standard deviation is unknown, and the X-bar chart is based on 3-sigma limits. Based on the sample data, what is LCL? 

a  

0.920

b  

0.887

c  

0.816

d  

0.844

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