stats test 4 - CHAPTER 11COMPARISONS INVOLVING PROPORTIONS...

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CHAPTER 11—COMPARISONS INVOLVING PROPORTIONS AND A TEST OF INDEPENDENCE MULTIPLE CHOICE 1. When developing an interval estimate for the difference between two population proportions, with sample sizes of n 1 and n 2 , a. n 1 must be equal to n 2 b. n 1 must be smaller than n 2 c. n 1 must be larger than n 2 d. n 1 and n 2 can be of different sizes, ANS: D PTS: 1 TOP: Interval Estimation 2. If we are interested in testing whether the proportion of items in population 1 is significantly less than the proportion of items in population 2, the 3. If we are interested in testing whether the proportion of items in population 1 is larger than the proportion of items in population 2, the 4. Assume we are interested in determining whether the proportion of voters planning to vote for candidate C (P C ) is significantly less than the proportion of voters planning to vote for candidate B (P B ). The correct null hypothesis for testing the above is 5. Assume we are interested in determining whether the proportion of voters planning to vote for candidate C (P C ) is significantly more than the proportion of voters planning to vote for candidate B (P B ). The correct alternative hypothesis for testing the above is
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a. Ha: P C - P B 0 b. Ha: P C - P B > 0 c. Ha: P C - P B < 0 d. Ha: P C - P B 0 ANS: B PTS: 1 TOP: Hypothesis Testing 6. The sampling distribution of 1 - 2 is approximated by a 7. If a hypothesis is rejected at 95% confidence,
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