SOLUTION: Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9. Develop a 99 percent confidence interval for th

Question 768200: Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9.
Develop a 99 percent confidence interval for the population mean? (Round your answers to 3 decimal places.)

thanks in advance for your help!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9.
Develop a 99 percent confidence interval for the population mean? (Round your answers to 3 decimal places.)
-----
sample mean = x-bar = 40
----
ME = z*s/sqrt(n) = 2.5758*9/sqrt(49) = 3.3118
-------------------
99% CI: 40-3.3118 < u < 40+3.3118
=====================================
Cheers,
Stan H.
=============
RELATED QUESTIONS
Forty-nine items are randomly selected from a population of 500 items. The sample mean is (answered by stanbon)

In this problem, how do they get the 2.682? Forty-nine items are randomly selected... (answered by rothauserc,addingup)

Forty-nine items are randomly selected from a population of 500 items. The sample mean is (answered by ewatrrr)

Forty-nine items are randomly selected from a population of 500 items. The sample mean is (answered by Fombitz)

1. Forty-four items are randomly selected from a population of 490 items. The sample mean (answered by Boreal)

Thirty-five items are randomly selected from a population of 370 items. The sample mean... (answered by MathTherapy)

A random sample of 100 items is selected from a population of size 350. What is... (answered by stanbon)

A population has a standard deviation of 50. A random sample of 100 items from this... (answered by stanbon)

1. The nine items of a sample had the following values: 45, 47, 50, 52, 48, 47, 49, 53,... (answered by Theo)