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We are studying the proportion of cities that have private

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We are studying the proportion of cities that have private garbage collector. We want a maximum error of 0.10 and a 95% confidence level, and tentatively estimate the proportion at 0.50. What is the minimum number of cities we need to contact?

A. 70
B. 95
C. 97
D. None of the above.

Reference no: EM13602106

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