1. We want to construct a 99% confidence interval for the proportion of people who will vote 'yes' on a ballot question in the next election. How many people should we sample to construct such an interval with a margin of error of 3%?

> qnorm(0.99) [1] 2.33 > qnorm(0.995) [1] 2.58

a. 1849

b. 1509

c. 74

d. 58

2. A study was done to evaluate whether an activity helped students answer a question correctly in an introductory statistics class. The results are below.

		Post-activity
		Incorrect Answer	Correct Answer
Pre-activity	Incorrect Answer	23	11
Correct Answer	0	5

What is the value of the test statistic?

a. 11.0

b. 8.24

c. 3.84

d. -2.87