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I am unable to figure out how to find E2 in this equation as no standard deviation or standard error is given. It tells me that the correct answer is 0.03, but I fail to understand how they got to that answer

I am unable to figure out how to find E2 in this equation as no standard deviation or standard error is given. It tells me that the correct answer is 0.03, but I fail to understand how they got to that answer

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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I am unable to figure out how to find E2 in this equation as no standard deviation or standard error is given. It tells me that the correct answer is 0.03, but I fail to understand how they got to that answer

Find the sample size needed to estimate the percentage of residents of one region of a country who are left-handed. Use a margin of error of three percentage points, and use a confidence level of 95%. Complete parts (a) through (c) below. normal distribution. While either a table of cumulative areas of the standard normal distribution or technology could be used to find z,/2, for the purposes of this solution technology will be used. Use technology to find the critical value separating an area of 0.025 in the right tail of the standard normal distribution. Za/2 = = 1.96 (Round to two decimal places as needed.) Recall that E is the desired margin of error in the formula given below for the sample size n required to obtain a confidence interval for the population proportion p. [Zu12]°0.25 E? n = What value should be substituted for E in the formula? 0.03 (Tun an integer or a dëcimal. Do not round.) You answered: 0.10 nd 0.03 for E and evaluate to find the sample size needed to estimate
Transcribed Image Text:Find the sample size needed to estimate the percentage of residents of one region of a country who are left-handed. Use a margin of error of three percentage points, and use a confidence level of 95%. Complete parts (a) through (c) below. normal distribution. While either a table of cumulative areas of the standard normal distribution or technology could be used to find z,/2, for the purposes of this solution technology will be used. Use technology to find the critical value separating an area of 0.025 in the right tail of the standard normal distribution. Za/2 = = 1.96 (Round to two decimal places as needed.) Recall that E is the desired margin of error in the formula given below for the sample size n required to obtain a confidence interval for the population proportion p. [Zu12]°0.25 E? n = What value should be substituted for E in the formula? 0.03 (Tun an integer or a dëcimal. Do not round.) You answered: 0.10 nd 0.03 for E and evaluate to find the sample size needed to estimate
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