Social Networking SitesIn 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 .

Answered: In a survey of 2255 randomly selected…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

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ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

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Social Networking Sites

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 .

Expert Solution

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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