A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.03 with 95% confidence if (a) she uses a previous estimate of 0.54? (b) she does not use any prior estimates?

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.03 with 95% confidence if (a) she uses a previous estimate of 0.54? (b) she does not use any prior estimates?

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 the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within

0.03

with

95%

confidence if

(a) she uses a previous estimate of

0.54?

(b) she does not use any prior estimates?

10/9/22, 10:52 PM
Level of Confidence,
(1 — «) -100%
90%
MALL
Area in Each Tail,
0.05
0.025
0.005
a
Critical Value, z
1.645
1.96
2.575
92638que
Table of critical values

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