9.14. Table 9.16 in Exercise 9.39 shows countywidc data for several variables in Florida. For those counties. Table 9.9 shows part of the printout for the regression analysisrelatingy = median income

(thousand of dollars) to x = percent of residents with at least a high school education.

(a) Report the prediction equation, and interpret the slope.

(b) County A has 10% more of its residents than county B with at least a high school education. Find their difference in predicted median incomes.

(c) Find the correlation. Interpret using (i) the sign, (ii) the magnitude, (hi) the standardized slope.

(d) Find t 2

. Explain how to interpret it.