An agricultural expert performs a study to measure the yield of a tomato yield which is...
An agricultural expert performs a study to measure the yield of
a tomato yield which is assumed
to be normally distributed with a standard deviation of 12.75
bushels. Studying 100 plots of
land, she finds that the average yield is 34 bushels.
(a) Find a 95% CI for the unknown population mean tomato yield.
(b) What is the margin of error of the confidence interval?
Homework Answers
Given : Sample size=n=100
Sample mean=
Population standard deviation=
Significance level=
Now , 
; From standard normal distribution table
a) The 95% CI for the unknown population mean tomato yield is ,
(b) The margin of error of the confidence interval is ,
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