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A television sports commentator wants to estimate the proportion of citizens who? "follow professional? football." Complete...

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Question

Basic Math

A television sports commentator wants to estimate the proportionof citizens who? "follow professional? football." Complete parts?(a) through? (c).

?(a) What sample size should be obtained if he wants to bewithin

44

percentage points with

9494?%

confidence if he uses an estimate of

4848?%

obtained from a? poll?The sample size is

nothing.

?(Round up to the nearest? integer.)?(b) What sample size shouldbe obtained if he wants to be within

44

percentage points with

9494?%

confidence if he does not use any prior? estimates?The samplesize is

nothing.

?(Round up to the nearest? integer.)

?(c) Why are the results from parts? (a) and? (b) so? close?

A.The results are close because the margin of error

44?%

is less than? 5%.

B.The results are close because

0.48 left parenthesis 1 minus 0.48 right parenthesisequals0.48(1?0.48)=0.24960.2496

is very close to 0.25.

C.The results are close because the confidence

9494?%

is close to? 100%.

Answer & Explanation Solved by verified expert
3.9 Ratings (416 Votes)
Solution Given thata 48 0481 1 048 052margin of error E 4 004At    See Answer
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