Question 144416
At the 0.05 significance level, can the software manager doing the study conclude 
that there is a difference in the mean number of hours spent per week by industry? 

Banking Retail Insurance
12 8 10
10 8 8
10 6 6
12 8 8
10 10 10

--------------------
Ho: u1 = u2 = u3
Ha: at least one of the means is different
--------
I ran ANOVA on the data using a TI calculator and got the following results:
F = 5.73
p-value = 0.01788..
-------
Conclusion: Since the p-value is less than 5%, reject Ho.
At least one of the means is different.
==============
Cheers,
Stan H.