A pollster wishes to estimate, with 99% confidence, the proportion of people who approve of how President Trump is performing his job. Find the minimum sample size necessary to achieve a margin of error of less than 3%. 1.Assuming no previous estimates are available. Round your answer up to the next integer. 2.Assuming a previous estimate of 0.20. Round your answer up to the next integer.

A pollster wishes to estimate, with 99% confidence, the proportion of people who approve of how President Trump is performing his job. Find the minimum sample size necessary to achieve a margin of error of less than 3%. 1.Assuming no previous estimates are available. Round your answer up to the next integer. 2.Assuming a previous estimate of 0.20. Round your answer up to the next integer.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 8E

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Question

1.Assuming no previous estimates are available. Round your answer up to the next integer.

2.Assuming a previous estimate of 0.20. Round your answer up to the next integer.

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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