PSY 2100

2. Last fall, a sample of N= 60 freshman was selected to participate in a new 4-hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was split into two groups. Group 1 (experimental) took part in the new 4-hour training program. Group 2 (control) did not take part in the 4-hour training program. Both groups must take the same English Language Skills course. The mean score on the final exam for Group 2 (control: n = 30) was M =74 with a standard deviation of S = 20. Group 1 (experimental: 1 = 30) in the new program had a mean score of M = $4 with a standard deviation of S = 18. Using an independent-sample t-test, evaluate the hypothesis that the new training program had an influence on performance in the English Language Skills course. a. Using symbols. state the hypotheses ( Ho and Hi) for a two-tailed test. (1 point) b. Find the critical value of the rejection region for a / 105 using a two-tailed test. (1 point) c. Calculate the test statistic (f-statistic) for the sample. (1 point) d. Make a decision regarding the hypothesis based on your results and write a conclusion sentence summarizing the results of the research. (1 point)