Question

. A sample poll of 100 voters chosen at random from all voters in a given district indicated
that 55% of them were in favor of a particular candidate. How large a sample of voters
should we take in Problem 9.10 in order to be (a) 95% and (b) 99.73% confident that the
candidate will be elected?
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Answer 1

Concept

A percentage is the ratio or quantity of something.

Given

Among 100 voters chosen 55% from all voters in a given district.

To find

number of samples if % will be 95 and 99.73.

Explanation

For the 95 percentage =100+100*40/100=140

For the 99.73% =100+100*44.73/100=144.73..

Hence the required number of samples will be 140 and 144.73.

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