Question

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.

b)  Calculate the level of significance, critical value and rejection region

c)  State the decision rule.

d)  Compute F test statistics.

e)  Based on the calculations above, what is the conclusion which can be made?

Answer 1

Thank you!