# Question

The following data give the ages (in years) of husbands and wives for six couples.

a. Do you expect the ages of husbands and wives to be positively or negatively related?

b. Plot a scatter diagram. By looking at the scatter diagram, do you expect the correlation coefficient between these two variables to be close to zero, 1, or 1?

c. Find the correlation coefficient. Is the value of r consistent with what you expected in parts a

and b?

d. Using a 5% significance level, test whether the correlation coefficient is different from zero.

a. Do you expect the ages of husbands and wives to be positively or negatively related?

b. Plot a scatter diagram. By looking at the scatter diagram, do you expect the correlation coefficient between these two variables to be close to zero, 1, or 1?

c. Find the correlation coefficient. Is the value of r consistent with what you expected in parts a

and b?

d. Using a 5% significance level, test whether the correlation coefficient is different from zero.

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