Answered: Find the sample size needed for a…

Find the sample size needed for a survey of voting preferences, if we want a margin of error of 3%, for a 95% confidence interval. No prior estimates are given.

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.CT: Chapter Test

Problem 24CT: Show the sample space of the experiment: toss a fair coin three times.

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Question

Find the sample size needed for a survey of voting preferences, if we want a margin of error of 3%, for a 95% confidence interval. No prior estimates are given.

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

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