Posted by **Jennifer** on Sunday, July 31, 2011 at 10:15am.

Twenty (20) students randomly assigned to an experimental group are studying for a test while listening to classical music. Thirty (30) students randomly assigned to a control group are studying for the same test in complete silence. Both groups take the test after studying for two weeks, and their performance on the test is as follows:

Exp

40-38-21-42-48-42-44-48-57-42-32-32-38-40-34-65-37-67-48-39-45-28-57-58-43-42-51-52-30-29-

Cont

51-25-33-42-40-55-50-24-38-21-38-38-54-29-52-58-30-25-20-28-26-44-38-35-34-26-30-32-50-30-

In this problem, you will determine what the experimenter should conclude

Using the 5% level of significance (alpha):

a) Determine the null and research hypotheses;

b) Select the correct template (templates for the Single Sample t-test, the Independent Samples t-test, and the ANOVA are included in the tabs that follow this tab);

c) Complete each of the blank cells in the template selected

d) State your conclusion, making reference to the test statistic, the critical value, the effect size, and your hypotheses.

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