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Practice Questions MBAC 6030 Midterm

# Practice Questions MBAC 6030 Midterm - Name of Candidate...

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MBAC 6030 Practice Midterm Questions These questions are intended as a study guide. It is even possible that some of these questions will show up on the midterm. Therefore, I will not answer specific questions about the practice/review. You may certainly study with your team or other classmates to determine the best answer to each of these questions. The idea is for you to review the material in the text and from class notes rather than getting the answers directly from me. (Feel free to send me a question if you’re stumped. I will probably not give a direct answer but send you to the best place for you to find the answer or the solution method.) You will be allowed to use a calculator and/or Excel during the midterm. You will not be able to use your text. I have included the formulas you might need as well as both a z table and a t table. You may be more comfortable using the excel functions to find these values but feel free to use the tables. I will not be taking off points due to rounding errors. In each problem 1-4, a random variable or experiment will be described. Based on the description identify the appropriate probability model (distribution) from the following list. You may use one distribution more than once. (a) Discrete Uniform Distribution (b) Binomial Distribution (c) Poisson Distribution (d) Exponential Distribution (e) Normal Distribution 1. In a randomly-chosen month, which probability model would you use to describe the number of accidents at the intersection of two streets? 2. Define X to be the number of ice cream scoops purchased by a customer. X can be 1, 2, 3, or 4 and each value is equally likely. The distribution on X is best described by which probability model? 3. For a randomly-selected customer placing a call to a customer-support center, the waiting time until s/he speaks to a customer service representative is best described by which probability model? 4. Which probability model is most nearly correct to describe the number of burned-out fluorescent tubes in a classroom with 24 fluorescent tubes? 5. Describe the relationship between the mean and median for a left-skewed distribution. Which of these two measures is a better measure of central tendency in this case? 6. Which type of chart is best for showing the relationship between two quantitative variables?

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