The following data are from a random sample of thirty cases from a study by Howell & Huessx (1981). The data represent the relationship between IQ scores on the Otis-Lennon Mental Abilities Test, administered while subjects were in fifth to eighth grade, and GPA in ninth grade. Subject GPA 2.75 4.00 2.25 102 2 108 3 109 4 118 3.00 79 1.67 2.25 2.50 6. 88 100 92 3.50 3.75 8. 9. 131 83 10 2.75 4.00 2.23 11 115 12 92 13 95 3.00 2.50 2.75 2,75 14 90 15 106 16 85 17 95 2.75 18 97 2.67 19 93 2.00 20 81 2.00 21 111 3.00 22 95 1.50 23 106 3.75 24 83 .67 25 81 1.50 3.00 26 27 112 1.75 3.75 1.00 2.50 85 28 115 29 86 30 85 Is IQ related to GPA? If a student's IQ is 117, what GPA would you predict? How much of the variation in GPA is explained by IQ? What can you conclude based upon the standard error of the estimate? Complete an APA. 3 part write-up for the linear regression worksheet.

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Regression Worksheet
The following data are from a random sample of thirty cases from a study by
Howell & Huessx (1981). The data represent the relationship between IQ scores
on the Otis-Lennon Mental Abilities Test, administered while subjects were in
fifth to eighth grade, and GPA in ninth grade.
Subject
1
IQ
GPA
2.75
102
108
4.00
2.25
3
109
118
3.00
1.67
2,25
79
6.
88
7
100
2.50
3.50
3.75
2.75
8
92
131
10
83
4,00
2,23
3,00
11
115
12
92
13
95
2.50
2,75
2.75
14
90
15
106
16
85
2.75
2,67
2.00
17
95
18
97
19
93
2,00
3.00
20
81
21
111
22
95
1.50
23
106
3.75
24
83
.67
25
81
1.50
26
112
3.00
27
85
1.75
3.75
28
115
29
86
1.00
30
85
2.50
Is IQ related to GPA?
If a student's IQ is 117, what GPA would you predict?
How much of the variation in GPA is explained by IQ?
What can you conclude based upon the standard error of the estimate?
Complete an APA. 3 part write-up for the linear regression worksheet.
Transcribed Image Text:Regression Worksheet The following data are from a random sample of thirty cases from a study by Howell & Huessx (1981). The data represent the relationship between IQ scores on the Otis-Lennon Mental Abilities Test, administered while subjects were in fifth to eighth grade, and GPA in ninth grade. Subject 1 IQ GPA 2.75 102 108 4.00 2.25 3 109 118 3.00 1.67 2,25 79 6. 88 7 100 2.50 3.50 3.75 2.75 8 92 131 10 83 4,00 2,23 3,00 11 115 12 92 13 95 2.50 2,75 2.75 14 90 15 106 16 85 2.75 2,67 2.00 17 95 18 97 19 93 2,00 3.00 20 81 21 111 22 95 1.50 23 106 3.75 24 83 .67 25 81 1.50 26 112 3.00 27 85 1.75 3.75 28 115 29 86 1.00 30 85 2.50 Is IQ related to GPA? If a student's IQ is 117, what GPA would you predict? How much of the variation in GPA is explained by IQ? What can you conclude based upon the standard error of the estimate? Complete an APA. 3 part write-up for the linear regression worksheet.
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