A sample survey interviews SRSs of 500 female college students and 550 male college students. Researchers want to determine whether there is a difference in the proportion of male and female college students who worked for pay last summer. In all, 410 of the females and 484 of the males say they worked for pay last summer.
Which of the following is the correct margin of error for a 99% confidence interval for the difference in the proportion of male and female college students who worked for pay last summer?
1.960sqrt((0.851(0.149))/(550)+(0.851(0.149))/(500))
2.576sqrt((0.851(0.149))/(550)+(0.851(0.149))/(500))
2.576sqrt((0.880(0.120))/(550)+(0.820(0.180))/(500))
1.960sqrt((0.880(0.120))/(550)+(0.820(0.180))/(500))
2.576sqrt((0.851(0.149))/(1050))
A sample survey interviews SRSs of 500 female college students and 550 male college students. Researchers want to determine whether there is a difference in the proportion of male and female college students who worked for pay last summer. In all, 410 of the females and 484 of the males say they worked for pay last summer. Which of the following is the correct margin of error for a 99% confidence interval for the difference in the proportion of male and female college students who worked for pay last summer? 0.851(0.149) O1.960 0.851(0.149) 550 500 O 2.576 0.851(0.149) 0.851(0.149) 550 500 0.880(0.120) O 2.576 0.820(0.180) 550 500 0.880(0.120) O 1.960 0.820(0.180) 550 500 0.851(0.149) O 2.576 1050