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Unformatted text preview: 170 CHAPTER 11. THE CHI-SQUARE DISTRIBUTION 11.2 Homework 2 Exercise 11.1 a. Explain why the “goodness of fit” test and the “test for independence” are generally right tailed tests. b. If you did a left-tailed test, what would you be testing? 11.2.1 Word Problems For each word problem, use a solution sheet to solve the hypothesis test problem. Go to The Table of Contents 14. Appendix for the solution sheet. Round expected frequency to two decimal places. Exercise 11.2 A 6-sided die is rolled 120 times. Fill in the expected frequency column. Then, conduct a hypoth- esis test to determine if the die is fair. The data below are the result of the 120 rolls. Face Value Frequency Expected Frequency 1 15 2 29 3 16 4 15 5 30 6 15 Table 11.1 Exercise 11.3 (Solution on p. 182.) The marital status distribution of the U.S. male population, age 15 and older, is as shown below. ( Source: U.S. Census Bureau, Current Population Reports ) Marital Status Percent Expected Frequency never married 31.3 married 56.1 widowed 2.5 divorced/separated 10.1 Table 11.2 Suppose that a random sample of 400 U.S. young adult males, 18 – 24 years old, yielded theSuppose that a random sample of 400 U....
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This document was uploaded on 10/31/2011 for the course STA 2023 at University of Florida.
- Fall '08