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Unformatted text preview: of real numbers. (i.e. usually measurements) Example 4 : Referring to Example 1, ﬁnd the probability distribution of the random variable X . 1 c ± Kendra Kilmer October 27, 2011 Example 5 : The number of cars waiting in line at the beginning of 2-minute intervals at a certain bank was observed. The following data was collected: Number of cars 1 2 3 4 Frequency of occurence 2 2 16 8 2 Let X represent the number of cars observed waiting in line and ﬁnd the probability distribution of X We use histograms to represent the probability distributions of random variables. We place the possible values for the random variable X on the horizontal axis. We then center a bar around each x value and let its height be equal to the probability of that x value. Example 6 : Referring to Example 5, a) Draw the histogram for the random variable X b) Find P ( X ≥ 2 ) Section 8.1 Highly Suggested Homework Problems: 1, 5, 7, 9, 19, 21, 23, 25 2...
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This note was uploaded on 03/27/2012 for the course MATH 141 taught by Professor Jillzarestky during the Fall '08 term at Texas A&M.
- Fall '08