In a certain city you want to estimate the percentage of households that use oil as...
In a certain city you want to estimate the percentage of households that use oil as fuel for heating. What size should the sample be? if you want to have a confidence of 98% with a margin of error of 3 percentage points.
a) 1503
b) 1309
c) 1172
d) 1068
Homework Answers
p(hat)= 0.5 and q(hat)= 1-0.5= 0.5
n= p(hat)*q(hat)*Zc^2,/E^2
n= 0.5*0.5*(2.33)^2/(0.03)^2
n= 1503 OPTION A
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