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ANOVA comparing average income at three levels of education

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Question a: A random sample of 30 executives from companies with assets over $1 million was selected and asked for their annual income and level of education. The ANOVA comparing the average income among three levels of education rejected the null hypothesis. The Mean Square Error (MSE) was 243.7. The following table summarized the results:

When comparing the mean salaries to test for differences between treatment means, the t statistic is based on:

a. The treatment degrees of freedom.
b. The total degrees of freedom.
c. The error degrees of freedom.
d. The ratio of treatment and error degrees of freedom.

Question b:
In a two-way ANOVA with interaction, a significant interaction term indicates that:

Choose the right answer:
a. the response variable is interactive.
b. a blocking factor is present.
c. both factors are unrelated.
d. both factors have a combined effect on the response variable.

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Question a: A random sample of 30 executives from companies with assets over $1 million was selected and asked for their annual income and level of education. The ANOVA comparing the average income among three levels of education rejected the null ...

Solution Summary

The expert uses ANOVA analysis to compare average income at three levels of educations.

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