# Question

The data from Exercise 4.66 for percentage of gross domestic product (GDP) spent on health care and life expectancy, in years, for selected countries are on the WeissStats CD. Do the required parts separately for each gender.

a. Decide whether finding a regression line for the data is reasonable. If so, then also do parts (b)–(d).

b. Obtain the coefficient of determination.

c. Determine the percentage of variation in the observed values of the response variable explained by the regression, and interpret your answer.

d. State how useful the regression equation appears to be for making predictions.

a. Decide whether finding a regression line for the data is reasonable. If so, then also do parts (b)–(d).

b. Obtain the coefficient of determination.

c. Determine the percentage of variation in the observed values of the response variable explained by the regression, and interpret your answer.

d. State how useful the regression equation appears to be for making predictions.

## Answer to relevant Questions

The data from Exercise 4.68 for home size (in square feet) and assessed value (in thousands of dollars) for the same homes as in Exercise 4.97 are on the WeissStats CD. a. Decide whether finding a regression line for the ...Graduation rate-the percentage of entering freshmen attending full time and graduating within 5 years-and what influences it have become a concern in U.S. colleges and universities. U.S. News and World Report's "College ...An ordinary deck of playing cards has 52 cards. There are four suits-spades, hearts, diamonds, and clubs-with 13 cards in each suit. Spades and clubs are black; hearts and diamonds are red. If one of these cards is selected ...The random variable Y is the number of persons living in a randomly selected occupied housing unit. Its probability distribution is as follows. a. Find and interpret the mean of the random variable. b. Obtain the standard ...An investor plans to put $50,000 in one of four investments. The return on each investment depends on whether next year's economy is strong or weak. The following table summarizes the possible payoffs, in dollars, for the ...Post your question

0