Unformatted text preview: fictitious. I do not know the fines for parking in Baltimore city.]  (2 points) A box contains 20 fuses, of which 5 are defective. What is the expected number of defective items among three fuses selected randomly?  (2 points) Decide whether or not the function p(n) = 1/n(n+1), n=1,2,3,…. is a probability frequency function. If so, if X is a random variable with this probability frequency function, find the value of E[X] if it exists.  (2 points) What are the expectation, variance, and standard deviation of the number of spades in a poker hand? (A poker hand is a set of five cards that are randomly selected from an ordinary deck of 52 playing cards.)...
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This note was uploaded on 02/26/2012 for the course STATISTICS 420 taught by Professor Wierman during the Fall '11 term at Johns Hopkins.
- Fall '11