A Random Digit Dialing Sample of 1750 Adults Found That

Multiple Choice

A random digit dialing sample of 1750 adults found that 1140 used some form of prescription medication. Of those who used prescription drugs, 940 said they are concerned about the current state of health care; 320 of the 610 nonusers agreed with this position as well. Let p₁ and p₂ be the proportion of all prescription drug users and nonusers, respectively, who are concerned regarding health care. Using technology, what is a 90% confidence interval for p₁-p₂?

A) 0.300 ± 0.023
B) 0.300 ± 0.038
C) 0.300 ± 0.045
D) 0.300 ± 0.054