A horticultural researcher is investigating the mean height of a certain type of plant. in making...
A horticultural researcher is investigating the mean height of a certain type of plant. in making inferences about the mean height of this plant, the error of estimation, d can be no larger then 3cm. given thatit is known that sigma=16 cm, how large of a sample is necessary for the error of estimation to be no larger than 3cm if the horticulturalist requires a 92% CONFIDENCE OF MEW
Homework Answers
At 92% confidence interval the critical value is z* = 1.75
Margin of error = 3
Or, z* * 
=
3
Or, 1.75 * 16/
= 3
Or, n = (1.75 * 16/3)^2
Or, n = 88
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