SOLUTION: Determine the minimum sample size needed to be 94% confident that the sample mean we get is within 1/2 inch of the true mean. n=33, mean=69.606, s= 3.010

Question 1040099: Determine the minimum sample size needed to be 94% confident that the sample mean we get is within 1/2 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 minimum sample size needed to be 94% confident that the sample mean we get is within 1/2 inch of the true mean.
n=33, mean=69.606, s= 3.010
-----
Since E = z*s/sqrt(n), n = [z*s/E]^2
-----
n = [1.8808*3.01/(1/2)]^2 = 129 when rounded up
------------
Cheers,
Stan H.
-------------
RELATED QUESTIONS
Determine the min. sample size needed to be 94% confident that the sample mean we get is... (answered by stanbon)

(1 point) Find the minimum sample size needed to be 99% confident that the sample... (answered by Theo)

3. A standard placement test has a mean of 115 and a standard deviation of mean = 10.... (answered by stanbon)

The standard IQ test is designed so that the mean is 100 and the standard deviation is... (answered by stanbon)

A standard placement test has a mean of 115 and a standard deviation of  = 10.... (answered by stanbon)

Determine the minimum sample size required when you want to be 90% confident that the... (answered by Boreal)

Determine a minimum required sample size if you want to be 95% confident that the sample... (answered by stanbon)

A standard placement test has a mean of 105 and a standard deviation of σ = 13.... (answered by stanbon)