BESC Final Exam Questions with Correct Answers
If you conduct a one-tailed (i.e., directional) two-sample t-test with a critical value of +2.20 and gets an observed value of t = -3.53, then what should you do? - Answer-Retain the null hypothesis
If you conducted an experiment to compare the ...
BESC Final Exam Questions with
Correct Answers
If you conduct a one-tailed (i.e., directional) two-sample t-test with a critical value of
+2.20 and gets an observed value of t = -3.53, then what should you do? - Answer-
Retain the null hypothesis
If you conducted an experiment to compare the effects of two different online ad
campaigns on the number of clickthroughs (i.e., how often people clicked on each ad),
then what is the dependent variable (DV)? - Answer-The number of clickthroughs
If you conduct an inferential test and retain the null hypothesis, then what is the chance
of a Type I error? - Answer-0.00
Imagine that you conduct a two-sample t-test with critical values of ±2.30 and gets an
observed value (or test value) of t = -2.09. What should you do? - Answer-Retain the
null hypothesis
The comparison group in a repeated-measures t-test is... - Answer-each person's own
score at time 1
When the means of two samples are being compared and Cohen's d = 1.10, then... -
Answer-the means are 1.1 standard deviations apart
The analysis of variance (or ANOVA) is the preferred inferential test when you need to...
- Answer-compare the means of three or more groups
If an ANOVA is statistically significant, what does that mean? - Answer-the variance of
the group means is greater than 0
What is the symbol for the test statistic in ANOVA? - Answer-F
What is the most common measure of effect size for ANOVA? - Answer-eta-squared
In order to calculate eta-squared, you first need to know... - Answer-the sum of squares
(SS)
The analysis of variance is useful if you want to... - Answer-compare the mean incomes
of people in several different jobs
, The version of ANOVA that is used to compare, for example, the well-being of people
from the three largest countries in North America is called the... - Answer-one-way
ANOVA
What is the null hypothesis for ANOVA? - Answer-all group means are equal
Imagine a study that compared men and women (the gender factor) and who were
social liberal or conservative (the social attitudes factor) on levels of empathy. If there
were significant differences between men and women, regardless of social attitudes,
then the gender factor would be called... - Answer-a significant main effect
In order to conduct an ANOVA, the dependent variable (DV) must be... - Answer-an
interval or ratio level variable
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
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