You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made one or more emergency room visits per year. Your estimate must be accurate within 4.2 % 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 estimate that found that 42 % of U.S adults made at least one emergency room visit in the past year.

Given: Margin of error (E)=0.042Confidence level (c)=0.99α=1-c =1-0.99 =0.01Area=1-α2…

Answered: You wish to estimate, with a 99%…

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 5E

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You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made one or more emergency room visits per year. Your estimate must be accurate within 4.2 % 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 estimate that found that 42 % of U.S adults made at least one emergency room visit in the past year.

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