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 |