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Click the icon to view the table of critical values. (a) n = | (Round up to the nearest integer.) (b) n =O (Round up to the nearest integer.)

Click the icon to view the table of critical values. (a) n = | (Round up to the nearest integer.) (b) n =O (Round up to the nearest integer.)

MATLAB: An Introduction with Applications
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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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 90% confidence if (a) she uses a previous estimate of 0.48? (b) she does not use any prior estimates? Click the icon to view the table of critical values. Table of critical values (a) n = (Round up to the nearest integer.) Level of Confidence, Area in Each Tail, Critical Value, zę (b) n = (Round up to the nearest integer.) (1 – a) · 100% 90% 0.05 1.645 95% 0.025 1.96 99% 0.005 2.575
Transcribed Image Text: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 90% confidence if (a) she uses a previous estimate of 0.48? (b) she does not use any prior estimates? Click the icon to view the table of critical values. Table of critical values (a) n = (Round up to the nearest integer.) Level of Confidence, Area in Each Tail, Critical Value, zę (b) n = (Round up to the nearest integer.) (1 – a) · 100% 90% 0.05 1.645 95% 0.025 1.96 99% 0.005 2.575
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