Do doctors in managed-care plans give less charity care? Researchers chose 60 communities at random and then chose doctors at random in each community. In all, they interviewed 10,881 doctors. Overall, 77.3 percent of the doctors said they had given some care free or at reduced rates because of the patient's financial need in the month before the interview. Doctors who received at least 85 percent of their practice income from managed-care plans were significantly less likely than other doctors to provide charity care.
For a simple random sample of size 10,881, the margin of error for 95 percent confidence is about:

Question

Quizplus · Accepted Answer

The margin of error for a large sample size like 10,881 at a 95% confidence level is relatively small, and among the given options, ± 0.96% is the most reasonable estimate for the margin of error. This is because the margin of error decreases as the sample size increases, and with a sample size as large as 10,881, the margin of error is expected to be less than 1%.

Do Doctors in Managed-Care Plans Give Less Charity Care? Researchers