Solution

The $\text{variables}$ are the topics that were investigated.

$$\textbf{variables}

$\textbf{Categorical/qualitative}$ variables places the individuals into a category, while a $\textbf{quantitative}$variable is a numerical variable.

(b) In the table, we note that we place the people in different age categories (13-17, 18-24, 25-34, 35-54, 55+, Unknown) and thus the variable is qualitative.

(c) The numbers (in the table above) represents the number of Facebook user that fall within the corresponding age category.

(f) It appears that a lot more older people signed up as Facebook user between 2009 and 2010, because the percentages of the first three age categories are larger in 2009 compared to 2010, while the other age categories contain a smaller percentage in 2009 compared to 2010.

The largest decrease in percentage occurred in the 18-24 age category, while the largest increase in percentage occurred in the 35-54 age category.

Answer

(a) Age

(b) Qualitative

(c) The number of Facebook user that fall within the corresponding age category.

(d) The percent is the frequency divided by the total frequency.

The slice size (central angle of the circle) is the product of 360$\text{\textdegree}$ and the percent.

Draw a circle

Draw the slices for each category using the determined slice sizes.

(e) The percent is the frequency divided by the total frequency.

The slice size (central angle of the circle) is the product of 360$\text{\textdegree}$ and the percent.

Draw a circle

Draw the slices for each category using the determined slice sizes.

(f) It appears that a lot more older people signed up as Facebook user between 2009 and 2010.

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