Facebook Stats In Exercise 1.14, we looked at the age distribution of users of the s...

Facebook Stats In Exercise 1.14, we looked at the age distribution of users of the social networking site Facebook (in thousands) as it changed from January 2009 to January 2010. The online article also provided insight into other demographics of Facebook users during this time period.9 Two bar charts, constructed from the data, are shown below.

a. What variables have been measured in this study? Are the variables qualitative or quantitative?

b. Describe the populations of interest. Do these data represent populations or samples drawn from a population?

c. What type of graphical presentation has been used? What other type could have been used?

d. How would you describe the changes in the geographical and educational distributions of Facebook users during this 1-year period?

Reference:

Facebook Fanatics The social networking site called Facebook has grown quickly since its inception in 2004. In fact, Facebook’s United States user base grew from 42 million users to 103 million users between 2009 and 2010. The table below shows the age distribution of Facebook users (in thousands) as it changed from January 2009 to January 2010.³

a. Define the variable that has been measured in this table.

b. Is the variable quantitative or qualitative?

c. What do the numbers represent?

d. Construct a pie chart to describe the age distribution of Facebook users as of January 4, 2009.

e. Construct a pie chart to describe the age distribution of Facebook users as of January 4, 2010.

f. Refer to parts d and e. How would you describe the changes in the age distributions of Facebook users during this 1-year period?