X-xbar	(X-xbar)^2
	1189	-83.22	6925.94
	1271	-1.22	1.49
	1267	-5.22	27.27
	1272	-0.22	0.05
	1268	-4.22	17.83
	1316	43.78	1916.49
	1275	2.78	7.72
	1317	44.78	2005.05
	1275	2.78	7.72
Mean	1272.22	Sum	10909.56
STD Function	36.93	divide by n-1	1363.69
		sqrt	36.93