Question 1Correct!2 / 2 ptsIn a(n) ________, each participant is assigned to only one group in order to compare mean differences.<br>In a(n) ________, each participant is assigned to only one group in order to compare mean differences.independent-samples t test

Question 2Correct!2 / 2 ptsA study found statistically significant results for a hypothesis tested with an independent-samples t test. The author of the study reported her effect size for the test as 0.28. According to Cohen's convention, this effect size is considered:<br>A study found statistically significant results for a hypothesis tested with an independent-samples t test. The author of the study reported her effect size for the test as 0.28. According to Cohen's convention, this effect size is considered:

Question 3Incorrect0 / 2 ptsMehl (2007) published in the journal Science the results of an extensive study of 396 men and women comparing the number of words uttered per day by each sex. Which statistical test should Mehl use to analyze the data?<br>

396 men and women comparing the number of words uttered per day by each sex. Which statistical test should Mehl use to analyze the data?

Question 4Incorrect0 / 2 ptsSkip 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. Which statistical test was the researcher most likely to have used to test his hypothesis?paired-samples t testz testsingle-sample t test

Question 5Correct!2 / 2 ptsThe formula for the degrees of freedom for the independent-samples t test is:<br>The formula for the degrees of freedom for the independent-samples t test is:

Question 6Correct!2 / 2 ptsThe fourth step in calculating a confidence interval for an independent-samples t test is to:<br>The fourth step in calculating a confidence interval for an independent-samples t test is to:

Question 7Correct!2 / 2 pts________ is a weighted average of the two estimates of ________.<br>________ is a weighted average of the two estimates of ________.

Question 8Correct!2 / 2 ptsSkip 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. What is the dependent variable in this study?

Question 9Correct!2 / 2 ptsThe first step in calculating a confidence interval for an independent-samples t test is to:<br>The first step in calculating a confidence interval for an independent-samples t test is to:

Question 10Incorrect0 / 2 ptsSkip 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.