SOLUTION: A car dealership is interested in finding out how many people are considering buying a new car. How many people must be surveyed so they can be 99% confident that the sample prop

Question 925519: A car dealership is interested in finding out how many people are considering buying a new car. How many people
must be surveyed so they can be 99% confident that the sample proportion is within three percentage points of the
true proportion?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A car dealership is interested in finding out how many people are considering buying a new car. How many people
must be surveyed so they can be 99% confident that the sample proportion is within three percentage points of the
true proportion?
----
n = [z/E]^2*pq
-----
n = [2.5758/0.03]^2*(1/2)(1/2)
------
n = 1843 when rounded up.
Cheers,
Stan H.
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