Question 2
An operations manager of a large firm is studying the monthly sales (in $’000) of three subsidiary companies over a sixmonth 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 sixmonth period?
c) State the decision rule.
A. 
To reject H_{o} if F_{Test} is > 7.35 

B. 
To accept H_{o} if F_{Test} is < 6.93 

C. 
To accept H_{o} if F_{Test} is < 7.70 

D. 
To reject H_{o} if F_{Test} is > 6.36 
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