## Description

## Statistics A Gentle Introduction 3rd Edition By Coolidge – Test Bank

**Chapter 5 Test Questions**

1.Which of the following is true about correlational designs?

a.Finding a relationship between two variables does not mean that one causes the other but could give clues to set up experiments where causality may be determined.

b.Finding a relationship between two variables NEVER means that one causes the other.

c.Correlational designs are not very common.

d.Correlational designs are more powerful than a controlled experiment.

2.A dependent variable in an experiment can be likened to the ___________ in the signal-to-noise ratio.

a.signal

b.to

c.noise

d.ratio

3.The difference between two means in a controlled experiment that is just attributed to chance or random error is called ___________ in the signal-to-noise ratio.

a.signal

b.to

c.noise

d.ratio

4.Which of the following is a Type I error?

a.rejecting H_{0} when H_{0} is false

b.rejecting H_{0} when H_{0} is true

c.not rejecting H_{0} when H_{0} is true

d.not rejecting H_{0} when H_{0} is false

5.Because it is said in science “one experiment does not prove anything,” statisticians rely on ___________ to test the usefulness of theories.

a.a controlled experiment

b.at least two experiments

c.parametric and nonparametric tests

d.replication

6.The probability of committing the Type I error is also called ___________.

a.alpha

b.beta

c.delta

d.omega

7.The probability of committing the Type II error is also called ___________.

a.alpha

b.beta

c.delta

d.omega

8.The minimum conventional level of statistical significance is ___________.

a..01

b..05

c..10

d..50

9.When findings in an experiment do not reach the conventional level of statistical significance, they are reported to be ___________.

a.nonsignificant

b.insignificant

c.significant

d.unworthy

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