1. Explain how a pie chart can be constructed. If a data value had relative frequency r, at what angle would the lines defining its sector meet?
2. The following are the estimated oil reserves, in billions of barrels, for four regions in the Western Hemisphere.
|
United States
|
38.7
|
|
South America
|
22.6
|
|
Canada
|
8.8
|
|
Mexico
|
60.0
|
Represent these data in a pie chart.