Answered: A researcher wishes to estimate, with…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A researcher wishes to estimate, with

99%

confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within

of the true 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 42% of the respondents said they think Congress is doing a good or excellent job.

(a) What is the minimum sample size needed assuming that no prior information is available?

(Round up to the nearest whole number as needed.)

(b) Find the minimum sample size needed, using a prior study that found that 42% of the respondents said they think Congress is doing a good or excellent job.

Answer=

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