Question

A psychologist would like to examine the effects of different testing methods on the final performance of college students. One group gets regular quizzes, one group gets three large exams, and the third group only gets a final exam. At the end of the course, the psychologist interviews each student to get a measure of the student's overall knowledge of the material. Quizzes Exams Final Only 4 1 0 6 4 2 3 5 0 7 2 2 We want to know if these data indicate any significant differences among the three methods? Test with a-.05. For this problem we need to use ANOVA For the Quizzes sample the Tis 4 for the Exams sample Tis and for the Final Only sample Tis [Select) The SS for the Quizzes sample is 4 [Select) for the Exams sample SS is (Select] and for the Final Only SS is [Select] Therefore, our Gis (Select) With this information we calculate our Ssbetween to be (Select] and our MSbetween is Select] Our SSwithin is (Select) and our MSwithin is Select Our calculated Fis [Select] Therefore, we reject the null hypothesis.

Answer 1

ANOVA, 20, 12, 4, 10, 10, 4, 3

32, 16, 24, 2.667, 6, reject

Source	SS	df	MS	F	p-value
Treatment	32.00	2	16.000	6.00	.0221
Error	24.00	9	2.667
Total	56.00	11