A researcher is testing the effect of a new cold and flu medication on mental alertness.A sample of n = 9 college students is obtained and each student is given the normal dose of the medicine.Thirty minutes later, each student's performance is measured on a video game that requires careful attention and quick decision making.The scores for the nine students are as follows:6, 8, 10, 6, 7, 13, 5, 5, 3.

a.Assuming that scores for students in the regular population average = 10, are the data sufficient to conclude that the medication has a significant effect on mental performance?Test at the .05 level of significance.

M =

SS =

s2 =

Sm =

t critical =

t calculated =

Decision =

b.Compute r², the percentage of variance explained by the treatment effect.

r²=________________________

c. Demonstrating how the outcome of the hypothesis test and the measure of effect size would be presented in a research report.