5.71 Life after death In a General Social Survey, in response to the question “Do you believe in life after death?” 1455 answered yes and 332 answered no.

a. Based on this survey, estimate the probability that a randomly selected adult in the United States believes in life after death.

b. A married couple is randomly selected. Estimate the probability that both subjects believe in life after death.

c. What assumption did you make in answering part b?

Explain why that assumption is probably unrealistic, making this estimate unreliable.