Which of the following is NOT used as groups in t distribution:
Question 115 out of 5 pointsA 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. In order to maximize the likelihood of finding significant results, the researcher's hypothesis is:
Question 125 out of 5 pointsThe standard deviation of a distribution of scores in a sample is known as _____, while the standard deviation of a distribution of means is referred to as _____.
σQuestion 135 out of 5 pointsWhat is the paired-samples t test statistic for the following difference scores: –2, –19, +17, –22, –6?Selected Answer:–0.92Answers:–6.40–0.926.9615.57