MAT 133: Sample Final Exam, p.14 25) A researcher wants to examine the difference In the proportions of residents who use Medicare In Michigan versus California. If the researcher wants to estimate this difference with 98% confidence and a 4% margin of error, how many residents from each of the states would they need to survey? (Show formula, substitution, and result) 26) The United States Anti-Doping Agency (USADA) is designing a new method for detecting if cyclists are using performance-enhancing drugs at a race checkpoint. a. Fill out the contingency table below for the USADA test results, giving context. Be sure to use different words for "reality" and the "decision" portions. Label the errors as Type I or Type II. REALITY He : The cyclist Is NOT doping Ho is true means. He is false means.. Do not Reject Ho means. DECISION Reject Ho means... b. Which is worse in this case? (Circle the best choice.) Type ! Error or Type ll Error Explain