Quiz 7

Problem 1. The following data represent the number of cups of coffee sold by four baristas in a recent sales competition

(a) (2 points) Find the probability that a coffee is sold by Bob, given that the coffee is regular roast.

(b) (2 points) Among all of Anne’s sales, what proportion are dark roast?

(c) (2 points) ARe the events “David” and “Decaf” independent? Why?

Problem 2. The following graph is a distribution representing the number of rooms in rented housing units from the year 2013

(a) ( 2 points ) What is the shape of the distribution?

(b) (2 points) Compute and interpret the mean of the distribution

(c) (2 points) What is the probability that randomly selected  rental unit has t least 3 rooms?

Problem 3 (5 points) .  A life insurance company sellls a $300,000 1-year term life insurance policy to a wenty year old male for $500.  According to the National Vita Statistics Report, the probability that the male survives the year is 0.998734.  Compute and interpret the expected value of this policy to the insurance company.