A produce manager wants to estimate the meansize of coke bottle fills with 95 percent confidence. A preliminary sample of 12 bottles shows a sample standard deviationof 3 mil, and mean of 500.
(A) What is the samplingor testing error?
(B) What would be the sample size to reduce the error to half its value?
Please see the attached file.
(A) What is the sampling or testing error?
Mean= M = 500
Standard deviation =s = 3
sample size=n= 12
s x=standard error of mean=s / square root of n= 0.8660 = ( 3 / square root of 12)
Confidence level= …
The solution calculates the sampling error and the sample size required to reduce the error to half its value