In a random sample of 300 elderly men, 65% were married, while in a random sample of 400 elderly women, 48% were married. Which of the following is the 99% confidence interval estimate for the difference between the proportion of elderly men and the proportion of elderly women who are married?
- 0.56±0.0670.56±0.067
- 0.17±0.0730.17±0.073
- 0.17±0.0960.17±0.096
- 0.55±0.067