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A research study was conducted to examine the efficacy of studying in groups. Students were randomly...

A research study was conducted to examine the efficacy of studying in groups. Students were randomly assigned to one of two groups: a single person group (individual studying), a group that had three study partners. After four weeks of studying, the students were given an exam. The raw scores on the exam are below. Construct a hypothesis test.

Group 1 Group 2

78 82

87 79

76 82

65 83

92 81

78 90

77 89

88 79

85 83

92 81

a. State the null and research hypothesis

b. Set the level of risk

c. Select the appropriate test

d. Compute the obtained value.

e. Find the critical value

f. Compare the obtained value and the critical value.

g. State your decision.

h. Write the result

Math   Statistics-And-Probability   
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