A quality control manager at a manufacturing facility has taken 4 samples with 4 observations each of the diameter of a part.
(a) Compute the mean of each sample.
(b) Compute an estimate of the mean and standard deviation of the sampling distribution.
(c) Develop control limits for 3 standard deviations of the product diameter. Samples of Part Diameter in Inches 1 2 34 5.8 6.2 6.1 6.0 5.9 6.0 5.9 5.9 6.0 5.9 6.0 5.9 6.1 5.9 5.8 6.1