Refer to the bolt strength problem 17.47. Assuming = 6,050 and = 100 with n

Refer to the bolt strength problem 17.47. Assuming μ = 6,050 and σ = 100 with n = 3, then LCL 5 5,876.8 and UCL 5 6,223.2. Below are five sets of 20 sample means using n = 3. Test each set of means for the pattern suggested in the column heading. This is a visual judgment question, though you can apply Rules 1­4 if you wish.

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