# The National Aeronautics and Space Administration (NASA) compiles data on space-shuttle launches and publishes them on its Web site. The

## Question:

Let X denote the crew size of a randomly selected shuttle mission between April 1981 and July 2000.

a. What are the possible values of the random variable X?

b. Use random-variable notation to represent the event that the shuttle mission obtained has a crew size of 7.

c. Find P(X = 4); interpret in terms of percentages.

d. Obtain the probability distribution of X.

e. Construct a probability histogram for X.

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...

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