# Question

Samples of size n = 5 are taken from a manufacturing process every hour. A quality characteristic is measured, and x and R are computed for each sample. After 2 samples have been analyzed, we have

The quality characteristic is normally distributed.

(a) Find the control limits for the x and R charts.

(b) ssume that both charts exhibit control. If the specifications are 26.40 0.50, estimate the fraction nonconforming.

(c) If the mean of the process were 26.40, what fraction nonconforming would result?

The quality characteristic is normally distributed.

(a) Find the control limits for the x and R charts.

(b) ssume that both charts exhibit control. If the specifications are 26.40 0.50, estimate the fraction nonconforming.

(c) If the mean of the process were 26.40, what fraction nonconforming would result?

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