Chapter 11: Designs with 2+ IV Levels & Inferential Statistics Flashcards

1
Q

What is the statistical test used for two or more levels of an independent variable as well as more than one IV?

A

The f-test which is computed via an ANOVA (analysis of variance)

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2
Q

When can you use a t-test?

A

Only when analyzing the statistical significance of the difference between the means of two treatment conditions/only one IV manipulated at 2 levels

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3
Q

What does it mean to have a significant f-value?

A

The variance among the treatment conditions is greater than the variance within the treatment conditions

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4
Q

How is an f-test determined to be significant?

A

By comparing the computed/obtained value of F and the appropriate critical value of F/based on the chosen alpha level usually .05 and degrees of freedom

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5
Q

Can a statistically significant f-value indicate that all differences among the treatment conditions are statistically significant?

A

No, a statistically significant f-value only indicates statistical significance somewhere. Must run either ANOVA or t-tests to determine what exactly is statistically significant.

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