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# 4. Facebook, Instagram, and LinkedIn are social networking sites on the Internet. In 2009, the Pew...

## Question

###### 4. Facebook, Instagram, and LinkedIn are social networking sites on the Internet. In 2009, the Pew...

4. Facebook, Instagram, and LinkedIn are social networking sites on the Internet. In 2009, the Pew Internet and American Life Project found evidence that the mean ages for the users of these three sites were not equal. Suppose that random samples of Facebook users, MySpace users, and LinkedIn users were taken this year and their ages are recorded in the following table. Assume all three distributions are approximately normal. Facebook Instagram Linkedin 25 34 28 25 24 30 2249 a) What is the response variable? b) What is the factor and how many levels does the factor have? (2) c) Is there evidence that the population mean age of the users users of social media differs for at least two groups? Conduct the appropriate test at the 5% level of significance. (2)Define parameter (4)Null and alternative hypothesis (2)test statistic (Symbol and value) (3)P value (4)Conclusion Place ANOVA table here b) Perform the appropriate Tukey multiple comparisons using a family confidence level of 0.95. State your conclusion using clear, complete sentences. Be sure your conclusion clearly states which social networking sites have significantly different means and by how much. (8) Place Tukey multiple comparisons here

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