# Hypothesis Test that Treatment Means Are Equal

1. Test the hypothesis that the treatment means are equal. Use the .05 significance level. Sample data is provided in the attachment.

a. State the null hypothesis and the alternate hypotheses.

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.

2. 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?

Sample data is provided in the attachment.

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#### Solution Summary

Excel document show, and a Word document explains, how to find the difference in means at the 0.5 significance level.