Question

A random sample of nonindustrialized countries was selected, and the life expectancy in years is listed for both men and women.

Men	45.2	54.3	62.8	53.2	68.4	64.7
Women	44.4	62.3	61.4	55.2	65.1	59.5

The correlation coefficient for the data is =r0.844 and =α0.05. Should regression analysis be done?

Find the equation of the regression line. Round the coefficients to at least three decimal places.

y'= a+bx

a=

b=

Find women's life expectancy in a country where men's life expectancy = 59 years. Round your answer to at least three decimal places.

Answer 1

The statistical software output for this problem is :

= 16.047 + 0.722 x

a = 16.047

b = 0.722

women's life expectancy = 58.633