Professor Elderman Has Given the Same Multiple-Choice Final Exam in His

question 13

Multiple Choice

Professor Elderman has given the same multiple-choice final exam in his Principles of Microeconomics class for many years. After examining his records from the past 10 years, he finds that the scores have a mean of 76 and a standard deviation of 12. What is the probability that a class of 15 students will have a class average greater than 70 on Professor Elderman's final exam?

• A) 0.0262
• B) 0.6915
• C) 0.9738
• D) Cannot be determined.

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Definitions:

Fixed Cost

Costs that do not vary with the level of production or sales volume, such as rent, salaries, and insurance.

Mixed Cost

A cost that contains both variable and fixed cost components, changing in total with levels of activity but not proportionately.

T-shirt

A garment for the upper body made of fabric, typically with short sleeves and a round neckline, worn as casual wear.

Variable Cost

Expenses that vary directly with the level of production or volume of operations in a business.