QMB-210 Midterm: Chapters 5 & 6
9 Jun 2017
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In a binomial distribution: the random variable x is continuous, the probability of event of interest p is stable from trial to trial, the results of one trial are dependent on the results of the other trials. If x has a binomial distribution with n = 5 and p = 0. 1, then p(x = 2) If n = 9 and p = 0. 45, then the standard deviation of the binomial distribution is. O = sr 9 x 0. 45 x 0 x 55 = 1. 49. 2: true or false: the probability that a standard normal random variable, z, is between 1. 50 and. 2. 10 is the same as the probability z is between 2. 10 and 1. 50. On a z scale the mean is always 0. The bell curve is symmetrical, therefore if the lower tail is -1. 50, the upper tail is 1. 50.
