- 1 Test Worksheet For Each Of The Following Practice Exercises Determine The Following Null Hypothesis Critical Tes 1 (57.26 KiB) Viewed 69 times
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1-Test Worksheet For each of the following practice exercises, determine the following: • Null hypothesis - Critical test statistic - Observed test statistic • Decision regarding the null Interpretation of the decision For significant findings, calculate Cohen's d Question 1 A psychologist has prepared an "Optimism Test" that is administered yearly to graduating college seniors. The test measures how each graduating class feels about its future - the higher the score, the more optimistic the class. Last year's class had a mean score of u = 15. A sample of n = 9 seniors from this year's class was selected and tested, the scores for these seniors are as follows: 7,12, 11, 15, 7, 8, 15,9,6 On the basis of this sample, can the psychologist conclude that this year's class has a different level of optimism than last year's class? Use a