# Question 13 0 out of 1 points what is the correct

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Question 13 0 out of 1 points What is the correct formula for calculating the standard deviation of a sample when one is NOT trying to estimate the population standard deviation?
Question 14 1 out of 1 points When conducting a paired-samples t test, the sample mean difference is compared to:
a distribution of mean differences. sample means. differences between means. the t distribution. Question 15 1 out of 1 points A single-sample t test is conducted on a sample of 26 people who were selected from a large population estimated at 2500 people. The critical cutoff for a two- tailed test at a p level of 0.05 would be:
Question 16 1 out of 1 points What would be the decision for the following paired-samples t test: t(24) = 4.11, p < 0.05?
Question 17 1 out of 1 points The formula for the research hypothesis for a paired-samples t test is: Selected Answer: H 1 : µ µ 2 Answers: H 0 : µ = µ 2 1 . 1 .
H 0 : µ 1 µ 2 . H 1 : µ 1 = µ 2 . H 1 : µ 1 µ 2 . Question 18 1 out of 1 points The paired-samples t test allows one to assess how performance can differ for one group of people over time. Answers:
Question 19 1 out of 1 points The second step in conducting the single-sample t test includes:
Question 20 1 out of 1 points The critical cutoff(s) for a one-tailed, paired-samples t test with 16 participants at a p level of 0.05 is (are):
Question 21 0 out of 1 points For the following data, what is the paired-samples t test statistic? Before After 110 103 98 104 89 97 114 127 Answers: Selected Answer: 4.26 8.52 5.00 4.26 1.17
Question 22 0 out of 1 points A clinical researcher was interested in determining whether her interventions were effective in minimizing depression symptoms among participants. To assess the effectiveness of the treatment program, she administered a depression inventory prior to treatment and after treatment. She hypothesized that depression scores would be lower at time 2 compared to time 1. She then compared the mean differences between the two groups and found that the treatment was effective. The dependent variable in this study is:
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