Monday
September 1, 2014

Homework Help: statistics

Posted by Cyn on Tuesday, May 3, 2011 at 8:06pm.

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 Cont
30 30
18 28
20 32
40 42
50 30
40 40
40 42
48 34
56 36
42 24
32 38
36 32
38 20
40 30
34 42
40 40
30 30
50 20
48 20
30 18
16
24
28
22
34
22
30
32
30
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 (round to two decimal places).
D) State your conclusion, making reference to the test statistic, the critical value, the effect size, and your hypotheses.

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