sample test 2

# sample test 2 - Sample Test II Name Fall 2006 DeMaio...

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Sample Test II Fall 2006 DeMaio Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Find the indicated probability. 1) The incomes of trainees at a local mill are normally distributed with a mean of \$1100 and a standard deviation \$150. What percentage of trainees earn less than \$900 a month? A) 35.31% B) 90.82% C) 9.18% D) 40.82% 1) 2) In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. For a randomly selected home, find the probability that the September energy consumption level is between 1100 kWh and 1225 kWh. A) 0.3791 B) 0.2881 C) 0.1971 D) 0.0910 2) Solve the problem. 3) The amount of rainfall in January in a certain city is normally distributed with a mean of 4.6 inches and a standard deviation of 0.3 inches. Find the value of the quartile Q 1 . A) 1.2 B) 4.5 C) 4.4 D) 4.8 3) 4) In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. Find P 45 , which is the consumption level separating the bottom 45% from the top 55%. A) 1148.1 B) 1087.8 C) 1021.7 D) 1078.3 4) Find the indicated probability. 5) Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. A vending machine will only accept coins weighing between 5.48 g and 5.82 g. What percentage of legal quarters will be rejected? A) 0.0196% B) 1.62% C) 1.96% D) 2.48% 5) Answer the question. 6) Criticize the following simulation: A student simulates math test scores by choosing a random number between 0 and 100. A) The simulation cannot model the real situation. The test performance of an individual student is inherently unpredictable. B) The simulation probably will not model the real situation. Most students dislike math.

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## This note was uploaded on 02/16/2010 for the course ECONOMICS 420K taught by Professor Dusansky during the Spring '10 term at University of Texas.

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sample test 2 - Sample Test II Name Fall 2006 DeMaio...

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