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The number of calls a customer service department of an airline company receives during one business hour.

The number of times you should call to order a pizza delivery until someone picks up the phone on the Super Bowl night.

A pop-up coffee stand charges $3 per cup of coffee they sell.  The daily demand (in number of cups sold) has mean 200 and standard deviation of 20. The cost of daily operation is $200. Compute the following. mean of the daily profit = [a] standard deviation of the daily profit = [b] 

Suppose Cov(X,Y) = -1. Find the variance of 2X – Y + 2.

[Q6 – Q10] Choose the distribution best models each of the following statistical phenomena.

What is the probability a patient answers that her pain is not reduced after the drug test? Provide four digits after the decimal point.

Compute the probability Y>3 or Y

The number of darts that hits the bulls eye if you throw three times.

Suppose X and Y are independent, what is the standard deviation of 2X – Y + 2? Provide 4 digits after the decimal point.

When is a time and materials contract not ideal?