2. Charts

(a) Below is a chart of unemployment rates by state (as of December 2020).

What do the values on the horizontal axis measure? Label the axis.

What do the values on the vertical axis measure? Label the axis.

What type of graph is it?

(b) Using the observations in the table below, split the range of values into three classes. Find the class midpoints.

Observation	Value, dollars	Belongs to class ...
Alaska	4
New York	9
Oregon	7
Tennessee	-3

(c) For each observation, determine which class it belongs to. Fill out the third column of the table above, referring to classes by their midpoints.

(d) Based on your intervals, plot an ogive of the above observations. Label the kinks with frequencies (either absolute or relative - your choice).