Question

Question 2

An operations manager of a large firm is studying the monthly sales (in $’000) of three subsidiary companies over a six-month period as given in the table below.

Company A	Company B	Company C
152	148	150
135	158	148
130	136	126
142	138	128
125	140	140
128	127	135

At the 0.01 significance level, can we conclude that there is a difference in the means of monthly sales of the three subsidiary companies over a six-month period?

a)  State the null hypothesis and alternative hypothesis.

	A.	Ho: µA = µB = µC Ha: at least two µ is not equals
	B.	Ho: µA = µB ≠ µC Ha: at least one µ is not equals
	C.	Ho: µA ≠ µB = µC Ha: at least one µ is not equals
	D.	Ho: µA = µB = µC Ha: at least one µ is not equals

Answer 1