A regional planner is studying the demographics in a region of a particular state. She has gathered

Fantastic news! We've Found the answer you've been seeking!

Question:

A regional planner is studying the demographics in a region of a particular state. She has gathered the following data on nine counties. Country Median Income Median Age Coastal A $46,715 58.8 1 B 48,533 50.0 1 C 46,532 56.4 1 D 48,523 52.7 0 E 32,927 58.2 0 F 34,057 55.5 0 G 31,580 43.1 1 H 38,609 32.0 0 J 39,228 27.4 0

(a). Is there a linear relationship between the median income and median age? (Round your answer to 3 decimal places.) , the correlation of Income and Median Age is .

(b). Which variable is the "dependent" variable? Median Income Median Age

(c-1). Use statistical software to determine the regression equation. (Round your answers to 2 decimal places.) Income = + Median Age. (c-2) Interpret the value of the slope in a simple regression equation. (Round your answer to the nearest whole number.) For each year increase in age, the income increases $ on average.

(d). Include the aspect that the county is "coastal" or not in a multiple linear regression analysis using a "dummy" variable. Does it appear to be a significant influence on incomes?