SOLUTION: A simple random sample of 120SAT scores has a mean of 1500. Assume that scores have a standard deviation of 175.construct a 99% confidence interval estimate of the mean SAT score.

Algebra ->  Probability-and-statistics -> SOLUTION: A simple random sample of 120SAT scores has a mean of 1500. Assume that scores have a standard deviation of 175.construct a 99% confidence interval estimate of the mean SAT score.       Log On


   

Question 1115350: A simple random sample of 120SAT scores has a mean of 1500. Assume that scores have a standard deviation of 175.construct a 99% confidence interval estimate of the mean SAT score.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A simple random sample of 120 SAT scores has a mean of 1500. Assume that scores have a standard deviation of 175.construct a 99% confidence interval estimate of the mean SAT score.
-----
u = 1500
std = 175
------
sample mean = 1500
ME = 2.5758*175 = 450.77
-----------------
99% CI:: 1500-450.77 < u < 1500+450.77
99% CI:: 149.23 < u < 1950.77
---------------
Cheers,
Stan H.
------------