1) Given the data shown for an 8-hour period (8 samples of size 4), create X chart and R chart.

Write regarding control.

Provide all constants and a demonstration of calculation of control limits.

Hour	Obs1	Obs2	Obs3	Obs4
1	1.14	0.94	1.25	1.46
2	0.76	1.15	1.41	0.98
3	3.00	1.00	1.05	0.78
4	1.23	1.13	1.13	1.13
5	1.16	1.10	1.59	1.37
6	1.52	0.88	1.31	1.38
7	1.10	1.34	1.12	1.35
8	0.90	1.13	1.19	1.21