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BESC Final Questions with Detailed
Verified Answers
Question: Which inferential test should be used to compare two sample
means to each other?
Answer: The two-sample t-test
Question:
The most important difference between Cohen's d and the t-test is that
Cohen's d ...
Answer: is not affected by sample size
Question:
What is the formula for the degrees of freedom (df) for a two-sample t-test?
Answer: n-2
Question:
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
Question:
When the means of two groups are the same, then Cohen's d ...
Answer: Will equal 0
Question:
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A two-sample t-test is an appropriate test when
Answer: two samples are being compared on an interval or ratio level variable
Question:
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
Question:
Cohen's d indicates the number of..
Answer: standard deviations between two means.
Question:
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
Question:
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
Question:
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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
Question:
One assumption of the two-sample t-test is that...
Answer: the two samples are independent of one another
Question:
Imagine that a researcher conducts a two-sample t-test with critical values of
±2.10 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
Question:
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 grouping variable?
Answer: Medication: antidepressant vs. placebo
Question:
The comparison group in a repeated measures t-test is...
Answer: each person's own score at time 1
Question:
Imagine that a researcher conducts a repeated measures t-test with critical
values of ±2.78 and gets an observed value (or test value) of t = -3.30. What is
the proper conclusion in this case?
BESC Final Questions with Detailed
Verified Answers
Question: Which inferential test should be used to compare two sample
means to each other?
Answer: The two-sample t-test
Question:
The most important difference between Cohen's d and the t-test is that
Cohen's d ...
Answer: is not affected by sample size
Question:
What is the formula for the degrees of freedom (df) for a two-sample t-test?
Answer: n-2
Question:
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
Question:
When the means of two groups are the same, then Cohen's d ...
Answer: Will equal 0
Question:
, Page | 2
A two-sample t-test is an appropriate test when
Answer: two samples are being compared on an interval or ratio level variable
Question:
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
Question:
Cohen's d indicates the number of..
Answer: standard deviations between two means.
Question:
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
Question:
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
Question:
, Page | 3
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
Question:
One assumption of the two-sample t-test is that...
Answer: the two samples are independent of one another
Question:
Imagine that a researcher conducts a two-sample t-test with critical values of
±2.10 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
Question:
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 grouping variable?
Answer: Medication: antidepressant vs. placebo
Question:
The comparison group in a repeated measures t-test is...
Answer: each person's own score at time 1
Question:
Imagine that a researcher conducts a repeated measures t-test with critical
values of ±2.78 and gets an observed value (or test value) of t = -3.30. What is
the proper conclusion in this case?
