Question 1
Correct!
2 / 2 pts
A researcher wants to statistically test whether gender affects
math test scores. Which test should the researcher use?<br>
A researcher wants to statistically test whether gender affects math test scores.
Which test should the researcher use?
one-way ANOVA

Question 2
Incorrect
0 / 2 pts
The less overlap there is among sample distributions, the:<br>

Question 3
Correct!
2 / 2 pts
Skip to question text.
Dr. Jameson wanted to know if IQ scores differed between male and female
participants in his study. He gave 28 participants an IQ test and then compared IQ
scores for gender differences. He hypothesized that there would be a statistically
significant gender difference in IQ scores. Contrary to Dr. Jameson's hypothesis,
there were no differences in IQ scores between men and women in his study.
Which test was Dr. Jameson most likely to use to test his hypothesis?

Question 4
Correct!
2 / 2 pts
Skip to question text.
A clinical researcher was interested in determining whether his interventions for
depression were effective in minimizing depression symptoms among his
participants. To assess the effectiveness of his treatment program, he administered
a depression inventory prior to his treatment and after his treatment. He
hypothesized that depression scores would be lower at time 2 compared to time 1.
He then compared the mean differences between the two groups and found that his
treatment was effective. The researcher's hypothesis is:

Question 5
Correct!
2 / 2 pts
Changes in within-groups variance result in changes in the
________ of the F ratio.<br>
Changes in within-groups variance result in changes in the ________ of the F
ratio.

Question 6
Incorrect
0 / 2 pts
Skip to question text.
Researchers were interested in whether relaxation training decreases the number of
headaches a person experiences. They randomly assigned 20 participants to a
control group or a relaxation training group and noted the change in number of
headaches each group reported from the week before training to the week after
training. Which statistical analysis would we perform to answer the researchers'
question?