Question
5. Farmer Carl wants to estimate the percentage of ears of corn that have worms. How...
5. Farmer Carl wants to estimate the percentage of ears of corn that have worms. How many ears of corn should farmer Carl sample in order to be 99% confident and 2 percentage points of the population percentage? Farmer Carl has prior data that can be used for the sample proportion, p=0.15.
Homework Answers
Answer #1
We have given,
Preliminary estimate for proportion (Known) = 0.15
Margin of error =E=0.02
Level of significance =1-0.99=0.01
Z critical value is (by using Z table) =2.576
Sample size formula is
=2115.15
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