Calculate g for (a) Problem 20 in Chapter 12 and The chancellor at City University is worried that the grades have fallen in the past year. The grade point average for graduating students in the previous 5 years was 2.80. The chancellor randomly samples 10 seniors from this year?? graduating class and obtains the following GPAs: 2.40, 2.80, 2.65, 2.15, 2.65, 2.72, 2.42, 2.70, 2.52, 2.49. a. What can the chancellor conclude? Use a two-tailed test at the .05 significance level.Compare this problem with Problem 14. b. Why was Problem 14 solved with a z test and this problem with a t test? (b) Problem 21 in Chapter 12. An industrial/organizational psychologist used a new training program designed to improve basic work skills. The training program is typically judged as effective if average scores on a basic work skills test exceed 80. The industrial/organizational psychologist obtained a random sample of participants who recently completed the training program,then administered to them a work skills test.Their scores on the test are given in Data 12A. a State the null and alternative hypothesis best suited to the nature of the psychologist?? inquiry. b Using IBM SPSS, test the null hypothesis at the .01 level of significance and state your conclusions.
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