A quality control manager at a manufacturing facility has taken four samples with four observations each of the diameter of a part.

Samples of Part Diameter in Inches
1		2		3		4
5.9		5.8		5.8		5.7
6.0		5.9		5.9		6.3
5.9		5.9		6.1		6.0
6.0		5.8		5.9		5.9

(a) Compute the mean of each sample.(Round answers to 3 decimal places, e.g. 15.250.)

Mean of sample 1		enter mean of sample 1 rounded to 3 decimal places
Mean of sample 2		enter mean of sample 2 rounded to 3 decimal places
Mean of sample 3		enter mean of sample 3 rounded to 3 decimal places
Mean of sample 4		enter mean of sample 4 rounded to 3 decimal places

(b) Compute an estimate of the mean and standard deviation of the sampling distribution.(Round answers to 4 decimal places, e.g. 15.2500.)

Mean		enter mean rounded to 4 decimal places
Standard deviation		enter standard deviation rounded to 4 decimal places

(c) Develop control limits for 3 standard deviations of the product diameter.(Roundanswers to 2 decimal places,e.g. 15.25.)

CL		enter control limit rounded to 2 decimal places
UCL		enter the upper control limit rounded to 2 decimal places
LCL		enter the lower control limit rounded to 2 decimal places