IE 3302 Chapter : Ch8HW F12
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Due wednesday, nov. 14, 2012 (start of class) Chapter 8 suggested problems: ch 8: 25, 35, 39, 41, 47, 49. Directions: this homework set should be turned in individually. Each problem may be presented in typed or hand-written form. Clearly show all steps and box any specific answers (do not box graphs) to receive full credit. Problems: note you may use excel to find means, standard deviations, and variances, but you must state which function you used to find each value. Problem 1: do problem 8. 18 in the textbook. Problem 2: the amount of time a drive-through bank teller spends on a customer is a random variable with a mean = 3. 2 minutes and a standard deviation of minutes. If a random sample of 100 customers is observed, find the probability that their mean time at the teller"s window is: at most 3 minutes, a minimum of 2. 8 minutes, somewhere between 2. 5 and 3. 5 minutes.
