STAT 2500 Midterm: STAT 2500 Midterm Fall 2003
31 Jan 2019
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Circle one and only one letter below for your answers. A sample of students indicates that the average book cost for a semester is and the standard deviation is . To nd the probability p {45 < x 55}, which of the following standard normal probabilities is the correct approximation to the binomial random variable above? (a) 0. 6597 (b) 0. 0484 (c) 0. 6802 (d) 0. 3198 (e) 0. 5287. Fall 2003: the length of time it takes mun students to nd a parking spot in the library parking lot follows a normal distribution with a mean of 3. 5 minutes and a standard deviation of 1 minute. Find the point in the distribution in which 75. 8% of the mun students exceed when trying to. The approximated probability value of p (z < 3. 50) is: (a) 1. 0000 (b) 0. 9987 (c) 0. 4987 (d) 0. 4950 (e) 0. 4500: let x be a normal random variable with mean and standard deviation .
