A psychologist would like to examine the effects of different testing methods on the final performance of college students. One group has regular quizzes, one group has three large exams, and the third group only has 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 410 642 G = 36 %3D 350 ΣΧ2 = 164 %3D 722 T= 20 T = 12 T = 4 SS = 10 SS = 10 SS = 4 1. Do the data indicate any significant differences among the three methods? Test with a = .05. Show all calculations (i.e., SS, df, MS and F) a. State the research hypotheses b. Identify the critical value c. Calculate the test statistic d. Evaluate the null hypothesis

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A psychologist would like to examine the
effects of different testing methods on the final
performance of college students. One group
has regular quizzes, one group has three large
exams, and the third group only has 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
410
642 G = 36
350 ΣΧ2 = 164
722
T= 20 T = 12 T = 4
SS = 10 SS = 10 SS = 4
1. Do the data indicate any significant
differences among the three methods? Test
with a = .05. Show all calculations (i.e., SS, df,
MS and F)
a. State the research hypotheses
b. Identify the critical value
c. Calculate the test statistic
d. Evaluate the null hypothesis
Transcribed Image Text:A psychologist would like to examine the effects of different testing methods on the final performance of college students. One group has regular quizzes, one group has three large exams, and the third group only has 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 410 642 G = 36 350 ΣΧ2 = 164 722 T= 20 T = 12 T = 4 SS = 10 SS = 10 SS = 4 1. Do the data indicate any significant differences among the three methods? Test with a = .05. Show all calculations (i.e., SS, df, MS and F) a. State the research hypotheses b. Identify the critical value c. Calculate the test statistic d. Evaluate the null hypothesis
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