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

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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 98â€‹% interval with a margin of error equal to 0.06to estimate the proportion.
The region should sample _ additional voters.â€‹(Round up to the nearestâ€‹ integer.)
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A tire manufacturer would like to estimate the average tire lifeof its newâ€‹ all-season light truck tire in terms of how many milesit lasts. Determine the sample size needed to construct a 96â€‹%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 . â€‹(Round up to the nearestâ€‹integer.)

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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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