SOLUTION: A random sample of 500 registered voters in Flagstaff found 50 registered voters who vote as an independent. Find a 95% confidence interval for the true percent of registered voter
Algebra ->
Probability-and-statistics
-> SOLUTION: A random sample of 500 registered voters in Flagstaff found 50 registered voters who vote as an independent. Find a 95% confidence interval for the true percent of registered voter
Log On
Question 1153673: A random sample of 500 registered voters in Flagstaff found 50 registered voters who vote as an independent. Find a 95% confidence interval for the true percent of registered voters in Flagstaff who vote as an independent. Express your results to the nearest hundredth of a percent. . Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The mean is 50/500 or 0.1
The SE is the sqrt ((p)*(1-p)/n) or sqrt(0.1*0.9/500)=0.0134
half-interval at 95% CI is 1.96*SE=0.0263
the 95% CI is (0.0737, 0.1263) or (7.37%, 12.63%)
