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Problems and Exercises II
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Reading ANOVA Summary Tables

An analysis of variance (ANOVA) is typically carried out using a statistical software package. Learning to "read" the computer output is extremely important. Look over the ANOVA summary tables below and attempt to answer the questions that follow.

Results of a single-factor independent groups design are as follows:

SourceSum of SquaresdfMean SquareFp
Factor A420.003140.0028.000.000
Error780.401565.00



1

How many levels of Factor A are there?
2

What is the total number of subjects in the experiment?
3

Assuming an equal number of subjects in each group, what is the group size?
4

Are the results of the omnibus F-test statistically significant?
5

(a) What does the researcher know on the basis of these results?

(b) What does the researcher not know?





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