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Multiple Choice Quiz I
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1

Null hypothesis significance testing begins with the assumption that the performance of two or more groups
A)does not differ.
B)differs only slightly.
C)differs nonsignificantly.
D)differs.
2

A statistically significant outcome is one that has a small likelihood of occurring if the null hypothesis is
A)wrong.
B)true.
C)false.
D)accepted.
3

A Type I error arises when we
A)reject a true null hypothesis.
B)reject a false null hypothesis.
C)fail to reject a false null hypothesis.
D)fail to reject a true null hypothesis.
4

The level of significance in psychological research is equivalent to
A)a Type II error.
B).50.
C)a Type I error.
D)the probability of rejecting a false null hypothesis.
5

The likelihood that an experiment will detect the effect of an independent variable when the independent variable really had an effect refers to an experiment's
A)level of significance.
B)alpha.
C)significance.
D)sensitivity.
6

The smaller the exact probability associated with results of NHST, the greater is the probability that
A)an exact replication will produce a statistically significant finding.
B)we have made a Type I error.
C)we have made a Type II error.
D)the results will not be replicated.
7

Results that are "statistically significant"
A)prove that the research hypothesis is true.
B)indicate the null hypothesis is true.
C)mean that the research hypothesis is false.
D)do not prove that the research hypothesis is true.
8

An effect size measure for an independent groups design with more than two means is
A)eta squared.
B)Cohen’s d.
C)Cohen’s r.
D)F squared.
9

In an analysis of variance for repeated measures the estimate of error variation is called
A)between group variation.
B)summary variation.
C)residual variation.
D)estimated variation.
10

A simple main effects analysis examines the effect of one independent variable
A)across all levels of another independent variable.
B)in a single factor design.
C)at one level of a second independent variable.
D)for all other independent variables.





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