human-factors psychologist studied three computer keyboard designs. Three samples ofindividuals were given material to type on a particular keyboard, and the number of errorscommitted by each participant was recorded. The data are as follows:

N = 15

G = 60

Sum of X² = 356

Keyboard A	Keyboard B	Keyboard C
0	6	6
4	8	5
0	5	9
1	4	4
0	2	6
T = 5	T=25	T=30
SS = 12	SS = 20	SS = 14

What is the F value?