In: Statistics and Probability
12. The homeownership rate in the U.S. was 64.4% in 2009. In order to determine if homeownership is linked with income, 2009 state-level data on the homeownership rate (Ownership in %) and median household income (Income in $) were collected. A portion of the data is shown in the accompanying table.
| State | Ownership | Income |
| Alabama | 70.4 | 37,990 |
| Alaska | 64.6 | 59,614 |
| ⋮ | ⋮ | ⋮ |
| Wyoming | 71.0 | 50,480 |
a-1. Estimate the model Ownership =
β0 + β1Income + ε.
(Negative values should be indicated by a minus sign. Round
your answers to 4 decimal places.) [If you are using R to obtain
the output, then first enter the following command at the prompt:
options(scipen=10). This will ensure that the output is not in
scientific notation.]
| yˆy^ = + Income |
a-2. Interpret the model.
For a $1000 increase in income, homeownership rate is predicted to decrease by 0.01%.
For a $1000 increase in income, homeownership rate is predicted to decrease by 0.1%.
For a $1000 increase in income, homeownership rate is predicted to decrease by 0.001%.
For a $1000 increase in income, homeownership rate is predicted to decrease by 0.0001%.
b. What is the standard error of the estimate?
(Round your answer to 2 decimal places.)
c. Interpret the coefficient of determination.
3.16% of the sample variation in y is explained by the estimated regression equation.
6.18% of the sample variation in x is explained by the estimated regression equation.
4.27% of the sample variation in x is explained by the estimated regression equation.
2.48% of the sample variation in y is explained by the estimated regression equation.
| State | Ownership | Income |
| Alabama | 70.4 | 37990 |
| Alaska | 64.6 | 59614 |
| Arizona | 65.9 | 43749 |
| Arkansas | 64.8 | 34548 |
| California | 55.0 | 54144 |
| Colorado | 66.0 | 53940 |
| Connecticut | 68.3 | 62861 |
| Delaware | 73.6 | 50124 |
| District of Columbia | 43.2 | 51151 |
| Florida | 67.8 | 43641 |
| Georgia | 64.3 | 41350 |
| Hawaii | 57.4 | 53659 |
| Idaho | 72.3 | 44788 |
| Illinois | 66.5 | 50880 |
| Indiana | 68.8 | 42315 |
| Iowa | 69.6 | 48731 |
| Kansas | 64.4 | 42727 |
| Kentucky | 67.9 | 40674 |
| Louisiana | 68.8 | 43443 |
| Maine | 70.9 | 45512 |
| Maryland | 67.4 | 62196 |
| Massachusetts | 62.9 | 57383 |
| Michigan | 71.3 | 44004 |
| Minnesota | 70.3 | 54100 |
| Mississippi | 71.2 | 33088 |
| Missouri | 69.1 | 46779 |
| Montana | 67.2 | 38447 |
| Nebraska | 67.4 | 47605 |
| Nevada | 60.0 | 49444 |
| New Hampshire | 73.6 | 62141 |
| New Jersey | 63.9 | 62787 |
| New Mexico | 65.9 | 41552 |
| New York | 52.2 | 48226 |
| North Carolina | 66.8 | 39916 |
| North Dakota | 63.1 | 48085 |
| Ohio | 66.7 | 43889 |
| Oklahoma | 66.6 | 43888 |
| Oregon | 65.4 | 47108 |
| Pennsylvania | 69.2 | 46182 |
| Rhode Island | 60.5 | 49644 |
| South Carolina | 70.8 | 39111 |
| South Dakota | 66.6 | 43836 |
| Tennessee | 67.6 | 38527 |
| Texas | 62.7 | 45485 |
| Utah | 71.6 | 56501 |
| Vermont | 71.5 | 50328 |
| Virginia | 67.4 | 58511 |
| Washington | 63.3 | 58402 |
| West Virginia | 74.8 | 38500 |
| Wisconsin | 67.7 | 49247 |
| Wyoming | 71.0 | 50480 |