Question

What Do People Do on Facebook?

In a survey of 2255 US adults, we learn that 970 of the respondents use the social networking site Facebook.¹ Of the 970 Facebook users, the survey shows that on an average day:

• 15% update their status
• 22% comment on another’s post or status
• 20% comment on another user’s photo
• 26% ‘‘like” another user’s content
• 10% send another user a private message.

¹Hampton, K., Goulet, L., Rainie, L., and Purcell, K., ‘‘Social Networking Sites and Our Lives,” Pew Research Center, June 16, 2011.

• Your Answer
• Correct Answer

Correct answer iconCorrect.

(a) For each of the bulleted activities, find a 99% confidence interval for the proportion of Facebook users engaging in that activity on an average day.

Round your answers to three decimal places.

Bulleted Activities		Confidence Interval
Update status:		Enter your answer in accordance to item (a) of the question statement	to	Enter your answer in accordance to item (a) of the question statement
Comment on another’s post or status:		Enter your answer in accordance to item (a) of the question statement	to	Enter your answer in accordance to item (a) of the question statement
Comment on another user’s photo:		Enter your answer in accordance to item (a) of the question statement	to	Enter your answer in accordance to item (a) of the question statement
‘‘Like” another user’s content:		Enter your answer in accordance to item (a) of the question statement	to	Enter your answer in accordance to item (a) of the question statement
Send another user a private message:		Enter your answer in accordance to item (a) of the question statement	to	Enter your answer in accordance to item (a) of the question statement

Answer 1

Update status:

0.1205	confidence interval 99.% lower
0.1795	confidence interval 99.% upper

Comment on another’s post or status:

0.1857	confidence interval 99.% lower
0.2543	confidence interval 99.% upper

Comment on another user’s photo:

0.1669	confidence interval 99.% lower
0.2331	confidence interval 99.% upper

‘‘Like” another user’s content:

0.2237	confidence interval 99.% lower
0.2963	confidence interval 99.% upper

Send another user a private message:

0.0752	confidence interval 99.% lower
0.1248	confidence interval 99.% upper