Comparative Pie Charts Flashcards
1
Q
Comparative pie charts
A
Pie charts that can be used to compare two sets of data.
2
Q
How to compare the pie charts
A
The area of the two pie charts should be in the same ratio as the two total frequencies
To compare frequencies, compare areas
To compare proportions, compare individual angles
3
Q
Comparative pie chart formulae
A
The ratio of the areas of the 2 circles= nr1 squared:nr2 squared
r2/r1=rootf2/rootf2
