What are the individual characteristics that differentiate Internet users from non-users and high users from low users?
Added by Enrique H.
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- Access and opportunity: - Users: Have reliable access to the Internet (devices, connectivity) and opportunities (education, work, social networks) that enable use. - Non-users: Lack regular access or opportunities; may have limited or no devices, Show more…
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Who Is More Trusting: Internet Users or Non-users? In a randomly selected sample of 2237 US adults, 1754 identified themselves as people who use the Internet regularly while the other 483 indicated that they do not use the Internet regularly. In addition to Internet use, participants were asked if they agree with the statement "most people can be trusted." The results show that 807 of the Internet users agree with this statement, while 130 of the non-users agree. ${ }^{33}$ Find and clearly interpret a $90 \%$ confidence interval for the difference in the two proportions.
Inference for Means and Proportions
Confidence Interval for a Difference in Proportions
a. Name of Internet service provider b. Time, in hours, spent surfing the Internet per week c. Whether the individual uses a mobile phone to stream video d. Number of online purchases made in a month e. Where the individual accesses social networks to find sought-after information
Banhishikha S.
According to the Pew Internet $\&$ American Life Project, 75$\%$ of American adults use the Internet (Pew Internet website, April $19,2008$ ). The Pew project authors also reported on the percentage of Americans who use the Internet by age group. The data in the file AgeGroup are consistent with their findings. These data were obtained from a sample of 100 Internet users in the $30-49$ age group and 200 Internet users in the $50-64$ age group. A Yes indicates the survey repondent had used the Internet; a No indicates the survey repondent had not. a. Fomulate hypotheses that could be used to detemine whether the percentage of Internet users in the two age groups differs from the overall average of 75$\%$ . b. Estimate the proportion of Internet users in the $30-49$ age group. Does this proportion differ significantly from the overall proportion of .75$?$ Use $\alpha=. .05$ c. Estimate the proportion of Internet users in the $50-64$ age group. Does this proportion differ significantly from the overall proportion of 75$?$ Use $\alpha=.05$ . d. Would you expect the proportion of users in the $18-29$ age group to be larger or smaller than the proportion for the $30-49$ age group? Support your conclusion with the results obtained in parts (b) and (c).
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