There is a 0.9968 probability that a randomly selected 50-ye…

There is a 0.9968 probability that a randomly selected 50-year-old female lives through the year.  A Fidelity life insurance company charges $226 for insuring that the female will live through the year.  If she does not survive, the policy will pay out $50,000 as a death benefit.  If a 50-year-old female purchases the policy, what is the expected value?

Suppose that pulse rates among healthy adults are normally d…

Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beats/second and a standard deviation of 10 beats/second. Draw the bell-shaped curve, label it, and shade the portion of the curve that corresponds to the probability in question. What percentage of healthy adults have pulse rates that are less than 65 beats/second?