SOLUTION: Determine the min. sample size needed to be 94% confident that the sample mean we get is within 1/4 inch of the true mean.
n=33, mean=69.606, s= 3.010
Algebra ->
Statistics
-> Confidence-intervals
-> SOLUTION: Determine the min. sample size needed to be 94% confident that the sample mean we get is within 1/4 inch of the true mean.
n=33, mean=69.606, s= 3.010
Log On
Question 1039813: Determine the min. sample size needed to be 94% confident that the sample mean we get is within 1/4 inch of the true mean.
n=33, mean=69.606, s= 3.010 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Determine the min. sample size needed to be 94% confident that the sample mean we get is within 1/4 inch of the true mean.
n=33, mean=69.606, s= 3.010
---------------
Since E = z*s/sqrt(n)
n = [z*s/E]^2
---
Note:: z = -invNorm(0.03) = 1.8808
n = [1.8808*3.01/(1/4)]^2 = 513 when rounded up
--------------
Cheers,
Stan H.
------------
(