SOLUTION: 1. The mean IQ score of a sample of 59 students selected from a high school is 96. Suppose the standard deviation of IQ's at this school is 7.8. What will be the 95% confidence in

Algebra ->  Probability-and-statistics -> SOLUTION: 1. The mean IQ score of a sample of 59 students selected from a high school is 96. Suppose the standard deviation of IQ's at this school is 7.8. What will be the 95% confidence in      Log On


   



Question 1159424: 1. The mean IQ score of a sample of 59 students selected from a high school is 96. Suppose the standard deviation of IQ's at this school is 7.8. What will be the 95% confidence interval for the mean IQ?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
half-interval is z(0.975)*sigma/sqrt(n) for 95% CI
this is 1.96*7.8/sqrt(59)
=1.99
the 95% interval adds and subtracts that from the sample mean
(94.01, 97.99)