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if you are going to develop an "R" chart based on range statistics and you are...

if you are going to develop an "R" chart based on range statistics and you are using a sample size of 15 for your charting purposes, which of the following is the upper control limit D4 factor for the chart?

1.70

1.87

1.76

1.92

1.65
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Answer #1

Here, Correct answer is E) 1.65

Explanation:

As here, I will be preparing R Chart, the R Chart to be developed based on the range statistics, and number of sample size = 15, to calculate the UCL of R chart, the formula is = D4*Range bar, using the table of X bar R Chart, for the sample size =15, we can get the value of D4, which is =1.653, Other options are not matching with the table value, thus, Other options are eliminated,

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