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Exam 3 Questions

Exam 3 Questions. 1. Test statistic t=1.79, n=33. Find and interpret the P-value. 2. Find the critical value(s) for a one-tail hypothesis test with and a 0.10 significance level.

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Exam 3 Questions

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  1. Exam 3 Questions

  2. 1. Test statistic t=1.79, n=33. Find and interpret the P-value. 2. Find the critical value(s) for a one-tail hypothesis test with and a 0.10 significance level. 3. For a confidence interval on the proportion of college students that have children, John found that E=.12. Interpret his margin of error.

  3. 4. Original claim: The mean height of NBA basketball players is at least 6 feet 8 inches. What are the null and alternative hypotheses? 5. Original claim: The mean height of NBA basketball players is at least 6 feet 8 inches. Initial conclusion is reject the null. State the final conclusion in simple nontechnical terms.

  4. 6. Claim: The proportion of male students born in the last half of the year is less than the proportion of female students born in the last half of the year. Use a 0.10 significance level. Data: from MTH 243 students Total students Born in last 6 months Male: 18 8 Female: 21 14

  5. 7. You have developed a new drug and you claim that it lowers cholesterol, so you express the claim as , where 100 is a standardized index of cholesterol. Which P-value would you prefer to get: 0.04 or 0.01? Why?

  6. 8. Consumers will spend an estimated average of $483 on merchandise for back to school spending based on a survey of 8453 consumers with a margin of error of plus or minus 1 percentage point. What is wrong with this statement?

  7. 9. We wish to conduct a poll to determine the percent of adults who feel that bars should refuse service to patrons who dance on the tables. If we wish to be 95% confident that the margin of error is 2%, how large should my sample be?

  8. 10. Discuss two different triggers for rejecting a null hypothesis. 11. What is the difference between a test statistic and a critical value? 12. What is the difference between an alpha and a P-value.

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