Question 1011561
 	SS	df	MS	F	p
Between::14.250	3	4.750	1.422	0.285
Within:	40.098	12	3.342		
Total:	54.348	15	
This was done with the E(x^2)-(E(x))^2
This makes intuitive sense.  The difference in the means is not great, and with only 4 samples the likelihood of a significant difference would a priori be low.