Two samples of Facebook users chosen by the Pew Research Center (one in 2019 and one in 2013) were asked how often they visit or use Facebook. The results are shown in the two-way table. We will assume the people in these samples are representative of all American Facebook users for the two given years. Is there evidence of a difference in Facebook usage by American Facebook users in 2019 compared to in 2013?

 

a. Several times a day was the most common response for both years. Which year had the larger proportion respond that they used Facebook several times a day? 

b. Could you use the Mean Group Diff to compare Facebook usage for the two years as presented in these summarized data? Explain. 

c. State the hypotheses for a chi-square test. 

d. Use the appropriate applet to find the p-value. 

e. State your conclusion in the context of the research question and if your results are significant, use follow-up confidence intervals to determine what is significantly different between the two years.

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Several times a day About once a day A few times a week Total 2019 2013 510 384 230 230 170 221 910 835 Total 894 460 391 1,745