On Thursday, June 13, 1996, then Arizona Governor Fife Symington was indicted on 23 counts of fraud and extortion. Just hours after the federal prosecutors announced the indictment, several polls were conducted of Arizonans asking whether they thought Symington should resign. A poll conducted by Research Resources, Inc., that appeared in the Phoenix Gazette, revealed that 58% of Arizonans felt that Symington should resign; it had a margin of error of plus or minus 4.9 percentage points. Another poll, conducted by Phoenix-based Behavior Research Center and appearing in the Tempe Daily News, reported that 54% of Arizonans felt that Symington should resign; it had a margin of error of plus or minus 4.4 percentage points. Can the conclusions of both polls be correct? Explain your answer.
Answer to relevant QuestionsThe headline read “President’s Job Ratings Fall to Lowest Point of His Presidency.” A Harris Poll taken April 5–10, 2005, of 1010 U.S. adults found that 444 of them approved of the way that President George W. Bush ...In discussing the sample size required for obtaining a confidence interval with a prescribed confidence level and margin of error, we made the following statement: “If we have in mind a likely range for the observed value ...x = 40, n = 50, 95% level. a. Use the one-proportion plus-four z-interval procedure, as discussed on page 449, to find the required confidence interval. b. Compare your result with the corresponding confidence interval ...x = 8, n = 40, H0: p = 0.3, H0: p < 0.3, α = 0.10 a. Determine the sample proportion. b. Decide whether using the one-proportion z-test is appropriate. c. If appropriate, use the one-proportion z-test to perform the ...The Substance Abuse and Mental Health Services Administration conducts surveys on drug use by type of drug and age group. Results are published in National Household Survey on Drug Abuse. According to that publication, 13.6% ...
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