Question

The Pew Research Center conducts an annual Internet Project, which includes research related to social networking. The two‑way table shows the percent of cell phone owners who use a social networking site on their phone, broken down by age, and is based on data reported by Pew as of January 2014.

The Pew Research Center conducts an annual Internet Project, which includes research related to social networking. The two-way table shows the percent of cell phone owners who use a social networking site on their phone, broken down by age, and is based on data reported by Pew as of January 2014 Use social networking on phone Age 18-29 Age 30-49 Age 50-64 Age 65-+ Total NoTotal 340 562 587 429 636 12821918 228 12 281 281 106 481 21 408 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI RMac-TXT PC-TXT CSV CrunchIt! (a) Regarding the Internet Project survey as approximately an SRS of Americans over the age of 18, give a 99% confidence interval (a, b) for the proportion of Americans over the age of 18 who use a social networking site on their phone. (Enter your answers rounded to four decimal places. If you are using Crunchlt, adjust the default precision under Preferences as necessary. See the instructional video on how to adjust precision settings.) a : b: (b) Compare the conditional distributions of age for those who use and do not use a social networking site on their phone. Using the table as a reference, give the sample conditional probabilities as percents in the appropriate answer boxes. YesNo Use social networking on phone Age 18-29 Age 30-49 Age 50-64 Age 65+ Enter your answers as percents rounded to two decimal places.) C: D: G:

Answer 1

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