Most coffee drinkers take a little time each day for their favorite beverage, and many take more

Question:

Most coffee drinkers take a little time each day for their favorite beverage, and many take more than one coffee break every day. The table below, adapted from a Snapshot in USA Today, shows the probability for x, the number of daily coffee breaks taken per day by coffee drinkers.

a. What is the probability that a randomly selected coffee drinker would take no coffee breaks during the day?
b. What is the probability that a randomly selected coffee drinker would take more than two coffee breaks during the day?
c. Calculate the mean and standard deviation for the random variable x.
d. Find the probability that x falls into the interval µ ± 2Ïƒ.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...