Graphing The Data: Natural Selection on Finch Beaks

The following table lists the frequency distributions of finch beak sizes, both before and after selection. Using a bar graph, plot the relationships between beak size and frequency. Then determine how much the mean beak size changed due to selection and decide which type of selection has occurred.

BEAK SIZE(mm) FREQUENCY BEFORE SELECTION FREQUENCY AFTER SELECTION  R                    
10.0 0.00 0.00           
10.2 0.00 0.00
10.4 0.02 0.00
10.6 0.04 0.00
10.8 0.08 0.00
11.0 0.16 0.00
11.2 0.20 0.00
11.4 0.20 0.00
11.6 0.16 0.02
11.8 0.08 0.04
12.0 0.04 0.08
12.2 0.02 0.16
12.4 0.00 0.20
12.6 0.00 0.20
12.8 0.00 0.16
13.0 0.00 0.08
13.2 0.00 0.04
13.4 0.00 0.02
13.6 0.00 0.00
13.8 0.00 0.00