PracticeReview

# PracticeReview - Spring 2010 FORM C Name Last First Section...

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Questions 4 – 6 refer to the following: U.S. college students spend an average of \$900 on textbooks each year. Although not given on the web site, suppose that the data are normally distributed with a population standard deviation of \$350. (Source: http://www.uspirg.org/higher-education/affordable-textbooks ) 4. Find the third quartile (rounded to nearest dollar) for the amount that U.S. college students spend in a year on textbooks. 5. What is the probability that a randomly selected individual spends at least \$450? A. 0.0993 B. 0.6445 C. 0.9007 D. 1 6. Consider the two statements: I. a randomly chosen individual student spends at most \$600 in a year on textbooks or II. 20 randomly chosen students spend an average of at most \$600 in a year on textbooks? Which of the following is true?
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