# Question

The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below.

(a) Construct upper and lower control limits for the x-bar chart, using the given product parameters.

(b) Plot the data on the control chart.

(c) Is this process in control? Explain your reasoning.

(a) Construct upper and lower control limits for the x-bar chart, using the given product parameters.

(b) Plot the data on the control chart.

(c) Is this process in control? Explain your reasoning.

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