A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle fatalities that were caused by alcohol-impaired driving. His estimate must be accurate within 5% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 24% of motor vehicle fatalities that were caused by alcohol-impaired driving. (c) Compare the results from parts (a) and (b). C (a) What is the minimum sample size needed assuming that no prior information is available? n= (Round up to the nearest whole number as needed.) (b) What is the minimum sample size needed using a prior study that found that 24% of motor vehicle fatalities that were caused by alcohol-impaired driving? n= (Round up to the nearest whole number as needed.) (c) How do the results from (a) and (b) compare? OA. Having an estimate of the population proportion has no effect on the minimum sample size needed. OB. Having an estimate of the population proportion raises the minimum sample size needed. OC. Having an estimate of the population proportion reduces the minimum sample size needed. 14

A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle fatalities that were caused by alcohol-impaired driving. His estimate must be accurate within 5% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 24% of motor vehicle fatalities that were caused by alcohol-impaired driving. (c) Compare the results from parts (a) and (b). C (a) What is the minimum sample size needed assuming that no prior information is available? n= (Round up to the nearest whole number as needed.) (b) What is the minimum sample size needed using a prior study that found that 24% of motor vehicle fatalities that were caused by alcohol-impaired driving? n= (Round up to the nearest whole number as needed.) (c) How do the results from (a) and (b) compare? OA. Having an estimate of the population proportion has no effect on the minimum sample size needed. OB. Having an estimate of the population proportion raises the minimum sample size needed. OC. Having an estimate of the population proportion reduces the minimum sample size needed. 14

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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