Book page 10-15

6 important questions on Book page 10-15

Why is it called analysis of variance?

Because the goal is to partition or divide the variance of scores on the Y outcome into variance that can be predicted from group membership and variance that cannot be predicted from group membership

Explain the difference between t test and ANOVA

T test provides info about the distance between the means on a quantitative outcome variable for just two groups, whereas a one-way ANOVA compares means on a quantitative variable across many number of groups

What represents the categorical predictor variable in an ANOVA?

Naturally occurring groups or groups formed by a researcher and then exposed to different interventions
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What tells the term between -S us?

That each participant is a member of one and only one group, that there are no repeated measures and that participants are not matched or paired across samples

In what way can you limit the risk for type 1 error in ANOVA?

By obtaining a single omnibus test that examines all possible comparisons among means in the study

What does error mean in ANOVA?

The parts of scores that cannot be predicted from type or treatment or group membership

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