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A certain region would like to estimate the proportion of voters who intend to participate in...

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Basic Math

A certain region would like to estimate the proportion of voterswho intend to participate in upcoming elections. A pilot sample of25 voters found that 15 of them intended to vote in the election.Determine the additional number of voters that need to be sampledto construct a 98​% interval with a margin of error equal to 0.06to estimate the proportion.

The region should sample _______________ additional voters.​(Round up to the nearest​ integer.)

________________________________________________________________________________________________

A tire manufacturer would like to estimate the average tire lifeof its new​ all-season light truck tire in terms of how many milesit lasts. Determine the sample size needed to construct a 96​%confidence interval with a margin of error equal to 3,200 miles.Assume the standard deviation for the tire life of this particularbrand is 7,000 miles.

The sample size needed is____ . ​(Round up to the nearest​integer.)

Answer & Explanation Solved by verified expert
3.7 Ratings (351 Votes)
1 The following information is provided Significance Level 002 Margin of Error E 006 The provided estimate of proportion p is p 06 The critical value for significance level 002 is 233 The following formula is used    See Answer
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