In a July 2012 Gallup poll that surveyed 1014 randomly selected U.S. adults, 5% said that they considered themselves vegetarians.
a. Describe what the parameter is in this context.

b. The standard deviation (SD) from the simulated null distribution is 0.007. Use the 2SD method to find a 95% confidence interval for the parameter.
c. If we had 2020 in our sample, how would that change the width of our 95% confidence interval? (Circle the correct answer.)

Wider             Same width             Narrower

d. Using the Theory-Based Inference applet we find both 95% and 99% confidence intervals as shown below. Denote which is which.

(0.032, 0.068)            (0.037, 0.063)