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Forty-eight devices selected from a warehouse were randomly assigned to three treatment groups, A, B

Question: Forty-eight devices selected from a warehouse were randomly assigned to three treatment groups, A, B and C. Nothing was done to the A devices as these acted as a control group. The B devices were immersed in water and the C devices were dropped from a height. All the devices were then tested in random order and the performance data are reported below.

Treatment	A	B	C
	0.38	0.53	0.51
	0.26	0.35	0.63
	0.41	0.38	0.46
	0.33	0.45	0.47
	0.33	1.09	0.42
	0.37	0.46	0.45
	0.54	0.57	0.41
	0.76	0.47	0.39
	0.51	0.39	0.35
	0.55	0.74	0.41
	0.53	0.32	0.49
	0.41	0.74	0.40
	0.47	0.48	0.58
	0.49	0.37	0.46
	0.42	0.52	0.38
	0.34	0.44	0.48

Means	0.444	0.519	0.456