Question
l) Find a 99% confidence interval for the partial slope of the population regression line pertaining to the independent variable camera body. Provide an explanation
l) Find a 99% confidence interval for the partial slope of the population regression line pertaining to the independent variable camera body. Provide an explanation of the meaning of this interval in the context of the problem. Show how this interval can be used to answer the question posed (at the 1% level of significance) in part j) of the problem.
m) Find a 99% confidence interval for the partial slope of the population regression line pertaining to the independent variable price of lens. Provide an explanation of the meaning of this interval in the context of the problem. Show how this interval can be used to answer the question posed (at the 1% level of significance) in part k) of the problem.
n) Find the variance inflationary factor for this model. Use it to draw a conclusion as to whether there is the existence of a significant amount of collinearlity in this model. Justify your answer.
Sales of Body | Price of Lens | Gender | Sales of Lens |
155 | $700 | 1 | 122 |
101 | 650 | 1 | 120 |
157 | 725 | 0 | 135 |
180 | 575 | 1 | 95 |
150 | 600 | 0 | 100 |
201 | 750 | 0 | 174 |
99 | 560 | 1 | 118 |
137 | 500 | 0 | 130 |
155 | 675 | 1 | 128 |
165 | 550 | 1 | 166 |
152 | 725 | 0 | 131 |
127 | 750 | 1 | 102 |
217 | 565 | 0 | 165 |
186 | 670 | 0 | 154 |
176 | 600 | 1 | 97 |
123 | 585 | 0 | 129 |
109 | 645 | 0 | 98 |
90 | 575 | 1 | 105 |
176 | 660 | 0 | 120 |
129 | 650 | 1 | 105 |
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