Symptoms among her participants to assess the

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symptoms among her participants. To assess the effectiveness of her treatment program, she administered a depression inventory prior to treatment and after treatment. She hypothesized that depression scores would be lower at time two compared to time one. She then compared the mean differences between the two groups and found that her treatment was effective. Which statistical test was the researcher MOST likely to have used to test her hypothesis? independent-samples t test Paired-samples t test Single-sample t test Z test
1 / 1 pts Question 2 The mean of the comparison distribution for the null hypothesis of an independent-samples t test is ___.
1 / 1 pts Question 3
When statisticians describe pooling the variances, they mean ___.
1 / 1 pts Question 4 Mehl et al. (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 et al. use to analyze their data?
1 / 1 pts

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