# ANOVA - Equality of Means

PROBLEMS:

Use the file ANOVA Data Sets. Solutions using Megastat or Excel and hand calculations.

1. Given the mean scores from groups 1, 2, & 3, use One-factor (One way) ANOVA to test for the equality of means. Analyze and report on your results. (HINT) The dame data are presented in two common forms in sheet #1. Observe the relationship and the logic of each. Different software packages often require one or the other. Megastat requires the one on the right. Note that One-way ANOVA can be used even if the sample sizes are unequal. Be sure to interpret post-hoc analysis if applicable

2. Check for the equality of the mean number of crimes in precincts 1, 2, 3 & 4 on sheet #2 using One-Factor ANOVA. Convert the data to the appropriate format for the software you are using if necessary. Analyze and report on your results. Be sure to interpret post-hoc analysis if applicable.

3. Check for the equality of the mean weights of the six different paint colors in sheet #3 using One-way ANOVA. Analyze and report your results. Be sure to interpret post-hoc analysis if applicable.

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#### Solution Summary

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