Fifteen midwestern and mountain states have united in an effort to promote and fore¬cast tourism. One aspect of their work has been related to the dollar amount spent per year on domestic travel (DTE) in each state. They have the following estimates for dis¬posable personal income per capita (DPI) and DTE:

a. From these data estimate a bivariate linear regression equation for domestic travel expenditures (DTE) as a function of disposable income per capita (DPI):
DTE = a + b (DPI)
DTE = _______ +/- _______ (DPI)
(Circle + or €“ as appropriate)
Evaluate the statistical significance of this model.
b. Illinois, a bordering state, has asked that this model be used to forecast DTE for Illinois under the assumption that DPI will be SI9,648. Make the appropriate point and approximate 95 percent interval estimates.
c. Given that actual DTE turned out to be $7,754 (million), calculate the percentage error in your forecast.

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State (S Millions) $17,907 15,782 17,158 15,688 15,981 $4,933 1,766 4,692 628 551 1,250 lowa North Dakota South Dakota Nebraska Kansas Montana Idaho Wyoming Colorado New Mexico Arizona Utah Nevada 15,128 934 0 3,836 19,781 6,455