ALPHA =	0.05
		Shift
		1	2	3
Machine	A	10	7	9
B	10	7	6
C	8	8	6
D	12	7	10
E	8	7	7
F	9	6	10
G	9	9	11
H	9	6	9

Often frequency data are tabulated according to two categories to decide if there is a relationship between categories and counts. Machine shop high tech errors are tabulated by shift and machine with significance level a. Are the machines and shifts operating consistently? Perform appropriate test.