SOLUTION: Construct a 99% confidence interval for a population mean. The sample mean is X = 40 and the standard error of the mean is σX = 2.4.

Algebra ->  Probability-and-statistics -> SOLUTION: Construct a 99% confidence interval for a population mean. The sample mean is X = 40 and the standard error of the mean is σX = 2.4.       Log On


   

Question 923311: Construct a 99% confidence interval for a population mean. The sample mean is X = 40 and the standard error of the mean is σX = 2.4.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
sample mean is X = 40 and the standard error of the mean is σX = 2.4.
99% confidence interval for a population mean.
ME = 2.576(2.4) = 6.2
CI = 40 - ME < u < 40 + ME
CI = 40 - 6.2 < u < 40 + 6.2
CI: (33.8, 46.2)
Note: As sample mean is a whole number, may wish to round CI to whole numbers:
CI( 34, 46)