# Exam 4 - Lecture 1 Recap Multiple Regression Why do...

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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?