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BESC 3010 Chpt 9 Exam with correct Answers
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BESC 3010 Chpt 9 Exam with correct Answers
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BESC 3010 Chpt 9 Exam with correctAnswers
Which inferential test should be used to compare two sample means to each other? -
Answer -The two-sample t-test
The most important difference between Cohen's d and the t-test is that Cohen's d... -
Answer -is not affected by sample size.
What is the formula for the degrees of freedom (df) for a two-sample t-test? - Answer -n
-2
If a researcher wants to compare the effects of an antidepressant to the effects of a
placebo on levels of anxiety, then what is the independent variable (that is, the IV)? -
Answer -Medication: antidepressant vs. placebo
When the means of two groups are the same, then Cohen's d... - Answer -will equal 0.
A two-sample t-test is an appropriate test when.. - Answer -two samples are being
compared on an interval or ratio level variable.
Imagine that a researcher conducts a one-tailed (i.e., directional) two-sample t-test with
a critical value of -1.83 and gets an observed value (or test value) of t = +1.98. What is
the proper conclusion in this case? - Answer -Retain the null hypothesis
Cohen's d indicates the number of... - Answer -standard deviations between two means.
If a researcher wants to compare the effects of an antidepressant to the effects of a
placebo on levels of anxiety, then what is the dependent variable (that is, the DV)? -
Answer -Levels of anxiety
If a researcher gathers data from participants before and after they participate in an
exercise training program and wants to know whether their performance scores
improved, then he should use... - Answer -a one-tailed, repeated measures t-test.
If a research conducts an inferential test (such as a t-test) and retains (i.e., fails to
reject) the null hypothesis, then what is the probability of a Type I error? - Answer -0.00
One assumption of the two-sample t-test is that... - Answer -the two samples are
independent of one another.
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