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5 step hypotheses and ANOVA tables

The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours spent per week by industry?


12 8 10
10 8 8
10 6 6
12 8 8
10 10 10

I need to do the 5 step Hypothesis procedure:

Hypothesis setup:

1. Set up the null and alternative hypothesis.
2. Pick the value of alpha and find the rejection region.
3. Calculate the test statistic.
4. Decide whether or not to reject the null hypothesis.
5. Interpret the statistical decision in terms of the stated problem.

And I need to perform the ANOVA table.

2.Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.


8 3 3
11 2 4
10 1 5
3 4

a. State the null hypothesis and the alternative hypothesis.
b. What is the decision rule?
c. Compute SST, SSE, and SS total.
d. Complete an ANOVA table.
e. State your decision regarding the null hypothesis.

I need to perform the 5 steps & the ANOVA table.

Solution Summary

This solution includes 5 step hypotheses and ANOVA tables to solve statistical problems.