Chapter 8 Mastery Quiz Flashcards

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1
Q

A Cohen’s d of –0.85 is what type of effect size?

A

large

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2
Q

A Cohen’s d value of 0.2 indicates how much overlap between distributions?

A

85 percent

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3
Q

The _____ estimate acknowledges the amount of uncertainty in the _____ estimate by reporting the margin of error.

A

interval; point

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4
Q

Power can be thought of as the percentage of the distribution of means, centered around the sample mean, that falls:

A

within the critical cutoff regions, where the null hypothesis can be rejected.

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5
Q

In completing a questionnaire on various global economic issues, 32 percent of randomly selected respondents identified the issues as largely associated with the United States. If the margin of error was ±5.8 percent, what is the interval estimate for the United States?

A

26.2–37.8 percent

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6
Q

Statistical power can be enhanced by decreasing the standard deviation in the sample. This can be accomplished by all of these EXCEPT:

A

working with a biased sample

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7
Q

Ideally, a statistical power analysis should be conducted _____ the study.

A

before

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8
Q

If a researcher runs the same study 20 times, the researcher would expect to find a mean in (or at) the _____ 95 percent of the time, with a p value of 0.05.

A

confidence interval

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9
Q

In calculating confidence intervals in a z distribution, start by finding the z scores centered around the:

A

sample mean

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10
Q

A Cohen’s d of –0.19 is what type of effect size?

A

small

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