Please help answer all of them 1. Use the formula in this example to determine the sample size, n. The estimated prevalence is 25%, and the desired confidence level is 95% with a margin of error of 7%. (This is the same as

Please help answer all of them 1. Use the formula in this example to determine the sample size, n. The estimated prevalence is 25%, and the desired confidence level is 95% with a margin of error of 7%. (This is the same as

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 26PFA

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Question

Please help answer all of them

1. Use the formula in this example to determine the sample size, n.

The estimated prevalence is 25%, and the desired confidence level is 95% with a margin of error of 7%. (This is the same as in the example, except the margin of error has been changed. Round your answer to the nearest integer.)
n=

2. Use the formula in this example to determine the sample size, n.

The estimated prevalence is 14%, and the desired confidence level is 94% with a margin of error of 4%. (Round your answer to the nearest integer.)
n =

3. Use the formula in this example to determine the sample size, n.

The estimated prevalence is 37%, and the desired confidence level is 97% with a margin of error of 1%. (Round your answer to the nearest integer.)
n =

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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