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General HyThere, Inc., is a manufacturer of hydraulic machinetools. It has had a history leakage trouble resulting from acertain critical fitting. Twenty five samples of machined partswere selected, one per shift, and the diameters of the fitting wasmeasured.

Required:

a. Construct x-bar- and R-charts for the data. What do youobserve?

b. If the regular machine operator was absent when samples 4, 8,14, 22 were taken, how will the results in part (a) beaffected?  

c. A second table in the worksheet represents measurements takenduring the next 10 shifts. Does the process continue to remainstable? What information does this table provide to the qualitycontrol manager?  

Can you show how you entered the data into excel toget the graphs please.

		Diameter Measurement(cm)
		Observations
Sample	1	2	3	4
1	10.94	10.64	10.88	10.70
2	10.66	10.66	10.68	10.68
3	10.68	10.68	10.62	10.68
4	10.03	10.42	10.48	11.06
5	10.70	10.46	10.76	10.80
6	10.38	10.74	10.62	10.54
7	10.46	10.90	10.52	10.74
8	10.66	10.04	10.58	11.04
9	10.50	10.44	10.74	10.66
10	10.58	10.64	10.60	10.26
11	10.80	10.36	10.60	10.22
12	10.42	10.36	10.72	10.68
13	10.52	10.70	10.62	10.58
14	11.04	10.58	10.78	10.17
15	10.52	10.40	10.60	10.40
16	10.38	10.02	10.60	10.60
17	10.56	10.68	10.78	10.34
18	10.58	10.50	10.48	10.60
19	10.42	10.74	10.64	10.50
20	10.48	10.44	10.32	10.70
21	10.56	10.78	10.46	10.42
22	10.82	10.64	11.00	10.01
23	10.28	10.46	10.82	10.84
24	10.64	10.56	10.92	10.54
25	10.84	10.68	10.44	10.68
		c) The followingtable represents measurements taken during the next 10 shifts.
		Observations
Sample	1	2	3	4
1	10.40	10.76	10.54	10.64
2	10.60	10.28	10.74	10.86
3	10.56	10.58	10.64	10.70
4	10.70	10.60	10.74	10.52
5	11.02	10.36	10.90	11.02
6	10.68	10.38	10.22	10.32
7	10.64	10.56	10.82	10.80
8	10.28	10.62	10.40	10.70
9	10.50	10.88	10.58	10.54
10	10.36	10.44	10.40	10.66