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12. In a recent (June 3, 2020) poll from Quinnipiac University, registered voters in Texas were...

12. In a recent (June 3, 2020) poll from Quinnipiac University, registered voters in Texas were asked “If the election for president were being held today, and the candidates were Joe Biden the Democrat and Donald Trump the Republican, for whom would you vote?” The summary of their responses is listed below. Biden 43% Trump 44% Someone Else 3% Wouldn’t Vote 3% Don’t Know 7%

a. If the poll has a margin of error of ±2.8 percentage points, can we accurately say that Trump is in the lead? (2 pts)

b. Construct a 95% confidence interval for Biden if the sample size is 1,166. (3 pts)

c. In your own words, explain what “95% confidence” means in a 95% confidence interval. (2 pts)

Math   Statistics-And-Probability   
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