The following example was taken from Tamhane & Dunlop (2000, p. 441). It was slightly modified for the purposes of this assignment.

Are a person’s brain size and body size predictive of his/her intelligence? Data on the intelligence based on the performance IQ (PIQ) scores from the Wechsler Adult Intelligence Scale (revised), brain size based on the count from MRI scans (given as count/10,000), and body size measured by height in inches and weight in pounds on 38 college students are shown below.

The data is presented below. Use SPSS to help you answer the following questions.

Note: You may copy and paste the data in SPSS but make sure the data is entered correctly. Data entry errors automatically reduce you one letter grade (i.e., 10 points).

Performance IQ MRI Height Weight

124 81.69 64.5 118

150 103.84 73.3 143

128 96.54 68.8 172

134 95.15 65.0 147

110 92.88 69.0 146

131 99.13 64.5 138

98 85.43 66.0 175

84 90.49 66.3 134

147 95.55 68.8 172

124 83.39 64.5 118

128 107.95 70.0 151

124 92.41 69.0 155

147 85.65 70.5 155

90 87.89 66.0 146

96 86.54 68.0 135

120 85.22 68.5 127

102 94.51 73.5 178

84 80.80 66.3 136

74 93.00 74.0 148

86 88.91 70.0 180

84 90.59 76.5 186

134 79.06 62.0 122

128 95.50 68.0 132

102 83.18 63.0 114

131 93.55 72.0 171

84 79.86 68.0 140

110 106.25 77.0 187

72 79.35 63.0 106

124 86.67 66.5 159

132 85.78 62.5 127

137 94.96 67.0 191

110 99.70 75.5 192

86 88.00 69.0 181

81 83.43 66.5 143

128 94.81 66.5 153

124 94.94 70.5 144

94 89.40 64.5 139

89 93.59 75.5 179

Note: Follow directly from our discussion board assignment. Be sure to answer all parts to a question and clearly label all answers for each verb (or question) asked below.

Consider all predictor variables available to predict intelligence (IQ). Use SPSS to find the ‘best subset’ for the Forward, Backward, and Stepwise selection methods.

1. Report the ‘best subset’ for the forward method.
2. Report the ‘best subset’ for the backward method.
3. Report the ‘best subset’ for the stepwise method.
4. Report the model you would choose as your ‘best subset’. Provide justification for your choice.

Price: $14.47

Solution: The downloadable solution consists of 8 pages, 647 words and 6 charts.
Deliverable: Word Document