Section 21.1

Exercise Set A: 1, 3, 4, 5, 6

Section 21.2

Exercise Set B: 1, 2, 4

Section 21.3

Exercise Set C: 1, 2, 3, 4, 5, 6, 7, 8

Section 21.4

Exercise Set D: 1, 2

Also:

Suppose that in a simple random sample of 1500 adults in the United States, 800 say they favor retaining the Affordable Care Act. Find confidence intervals for the true proportion of adults who favor retaining the Affordable Care Act at a (a) 95% confidence level, (b) 80% confidence level, and (c) 99% confidence level.

Answers:

(a) (0.5081, 0.5586) (b) (0.5166, 0.5501) (c) (0.4999, 0.5668)