Question

Mercedes tires at Tracy's plant are produced in a manufacturing process and the diameter is VERY important factor that must be controlled.

From sample sizes of 10 tires produced each day, the mean sample of this diameter have been as follows:

	SAMPLES
Day	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Mean
1	22	22	15	18	15	22	22	12	17	21	18.6
2	22	13	15	13	20	11	18	19	10	20	16.1
3	15	23	15	25	19	13	24	21	25	23	29.3
4	22	15	19	21	19	16	20	14	23	18	18.7
5	20	20	23	24	13	11	20	16	22	10	17.9

a) What are the UCL_x, LCL_x ; use the following z value = 3

b) UCL_R , LCL_R , use the following z value = 3

Answer 1