When estimating the true proportion, how large a sample is needed to be 95% confident that the error will not exceed 0.06?

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.2: Proportions
Problem 47WE
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When estimating the true proportion, how large a sample is needed to be 95% confident that the error will not
exceed 0.06?
0 268
O266
267
O 265
оооо
Transcribed Image Text:When estimating the true proportion, how large a sample is needed to be 95% confident that the error will not exceed 0.06? 0 268 O266 267 O 265 оооо
Chevrolet's customer relations department wishes to estimate the number of days it takes an automobile
dealer to sell a Chevrolet Aveo. Some cars are sampled to produce an estimate for the mean number of days
for an Aveo to be sold.
Which of the following ideas is false when calculating the estimate?
O If the standard deviation is small, a wider estimate will be produced.
O If the standard error is small, it will produce a narrow interval.
O If the confidence level is high, it will produce a wider error term.
O If the sample size is increased, a narrower confidence interval will result.
Transcribed Image Text:Chevrolet's customer relations department wishes to estimate the number of days it takes an automobile dealer to sell a Chevrolet Aveo. Some cars are sampled to produce an estimate for the mean number of days for an Aveo to be sold. Which of the following ideas is false when calculating the estimate? O If the standard deviation is small, a wider estimate will be produced. O If the standard error is small, it will produce a narrow interval. O If the confidence level is high, it will produce a wider error term. O If the sample size is increased, a narrower confidence interval will result.
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