1. (15+1 for Excel work) Grading assignments is a real problem, taking a great deal of time and while many students do a poor job, many copy and gain no benefit. An instructor who taught three sections of a course carried out a test. One section had no assignments, one had assignments but they were not graded, and the final section had graded assignments. Grades were reviewed after the first midterm. Assume each population is normally distributed, and samples are independent random samples. Using EXCEL where possible perform ALL ANOVA tests necessary to determine which approach if any led to higher grades. Use alpha = 0.05 in all tests. Use EXCEL for the ANOVA test and use the p values in testing. For those tests for which you cannot use EXCEL, use the standard write up as used in the practice assignments.

 No Assignments Assignments, Not Graded Assignments, Graded 69 73 83 69 63 97 92 68 72 84 79 79 79 57 84 84 68 76 76 72 91 63 74 76 76 49 83 82 84 88 89 79 91 72 71 96 72 80 68 65 74 99 73 71 89 47 63 80 92 88 79 71 83 91 83 89 83 81 82 83 92 69 76 80 92 90 64 79 79 72 81 67 84 76 86 79 81 86 74 81 82 81 75 84

1. (15+1 for Excel work) Grading assignments is a real problem, taking a great deal of time
and while many students do a poor job, many copy and gain no benefit. An instructor
who taught three sections of a course carried out a test. One section had no
population is normally distributed, and samples are independent random samples.
Using EXCEL where possible perform ALL ANOVA tests necessary to determine which
approach if any led to higher grades. Use alpha = 0.05 in all tests. Use EXCEL for the
ANOVA test and use the p values in testing. For those tests for which you cannot use
EXCEL, use the standard write up as used in the practice assignments.
No Assignments
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69
92
84
79
84
76
63
76
82
89
72
72
65
73
47
92
71
83
81
92
80
64
72
84
79
74
81

73
63
68
79
57
68
72
74
49
84
79
71
80
74
71
63
88
83
89
82
69
92
79
81
76
81
81
75

83
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91
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91
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90
79
67
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84