Unformatted text preview: probability that at least 4 will be in an accident this month? 4. Airplanes arrive at Chicago O’Hare airport at the average rate of 5.2 per minute. Air traffic controllers can safely handle a maximum of four airplanes per minute. What is the probability that airport safety is jeopardized? 5. Given the following probability distribution: X P(X) .5 1 .2 23 .10 4 .05 Find the following: a. Expected value b. Variance c. Standard deviation. 6. Carol spent all weekend partying and knows absolutely nothing about the 10 true/false questions on a Monday morning economics quiz. What is the probability that she gets at least 8 right by simply guessing? ** Review all the homework problems, problems in the lecture note. Then solve this worksheet. Good Luck!!!...
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 Spring '11
 bcd
 Normal Distribution, Standard Deviation, Variance, Probability theory, following probability distribution

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