For a study of counties in Florida the table shows
For a study of counties in Florida, the table shows part of a printout for the regression analysis relating y = median income (thousands of dollars) to x = percent of residents with at least a high school education.
a. 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.
b. Find the correlation. Interpret the (i) sign and (ii) strength of association.
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