In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet regularly. Of the Internet users, 1054 use a social networking site.1 Find a 90% confidence interval for each of the following proportions. 1Hampton, K., Goulet, L., Rainie, L., and Purcell, K., ‘‘Social Networking Sites and Our Lives,” Pew Research Center, June 16, 2011. (a) Proportion of US adults who use the Internet regularly. Round your answers to three decimal places. The 90% confidence interval is to .
In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet regularly. Of the Internet users, 1054 use a social networking site.1 Find a 90% confidence interval for each of the following proportions. 1Hampton, K., Goulet, L., Rainie, L., and Purcell, K., ‘‘Social Networking Sites and Our Lives,” Pew Research Center, June 16, 2011. (a) Proportion of US adults who use the Internet regularly. Round your answers to three decimal places. The 90% confidence interval is to .
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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Step 1
Given data,
n=2255
x=1787
sample proportion p=x/n =1787/2255 = 0.792
z-value at 90% confidence is Zc=1.645
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