Q#2 Space Shuttles: The National Aeronautics and Space Administration (NASA) compiles data on Space-Shuttle launches and publishes them on its Wed site. The following table displays a frequency distribution for the number of crew members on each shuttle mission April 1981 to July 2000.   Crew Size 2 3 4 5 6 7 8 Frequency 4 1 2 36 18 33 2     Let X denote the crew size of 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 interms of percentages. d) Obtain the probability distribution of X. e) Construct a probability histogram for X.

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