Student hypothesize that exposure to music has an effect on learning, either helping it or harming it. You randomly select 18 high school sophomores who have had no exposure to statistics. Ten of them hear Mozart's Piano Concerto No. 1 in C Major at 40 decibels (quietly) while they study Chapter 5 in Gravetter's Statistics text for two hours. The other 8 study the same text in a library environment. On the exam the test group scored a mean of 70% with a SS of 800. The control group scored 80% with a Sum of Squares of 600.

• State the null hypothesis, both in words and in symbols.
• State the alternative hypothesis in words and symbols.
• State the degrees of freedom.
• Set at 0.05 and determine if this should be a one or two tailed test.
• Find t critical:
• Find the pooled variance
• Find the estimated standard error
• Find t obtained.
• Make a decision regarding H_o.
• Compute Cohen's
• Find percentage of variance accounted for (r²).
• Find F-max
• State your conclusion in APA style in words and symbols.