heel	New Putter	center	New Putter	toe	New Putter
Trial #	distance	off center	distance	off center	distance	off center
1	123	-3	132	1	104	1.5
2	125.5	-3	136	1	105	1.5
3	127	-0.5	137	1	105	0
4	129	-0.25	137	1	101	3.5
5	132	-1	137	1	102	3.5
6	134.5	-1	136	1	104	1.5
7	133	-4	134	1	104	-0.25
8	129.5	-3	135	1	104.5	3.5
9	132	-4	134	1	102.5	-0.25
10	131.5	-3.5	135	1	95	2.5
						
						
Average	129.7	-2.325	135.3	1	102.7	1.7
Stan Devi	3.62246	1.4722	1.63639	0	3.01109	1.52662
total SD	of distance	14.74012				
total SD	of accuracy	2.14129				
total avg	of distance	122.56667				
total avg	of accuracy	0.125				

	heel	Old putter	center	Old putter	toe	Old putter
	distance	off center	distance	off center	distance	off center
1	112	-3	120	-1	76	0
2	113	-3.5	123	-1	82	1
3	113.5	-3	124	-3.5	84	1
4	114.5	-4	123	-1	84	1
5	114.5	-4	126.5	-2	80	1
6	117	-4	127.5	-0.25	85	1
7	119	-4.5	129.5	-0.25	81	0
8	124	-4	131	-1	88.5	-1
9	120	-4	133	1	84.5	-1
10	108	-4	130	1	83	-1
Average	115.55	-3.8	126.75	-0.8	82.8	0.2
Stan Devi	4.56709	0.48305	4.17832	1.33229	3.35162	0.91894
total SD	of distance	19.36756				
total SD	of accuracy	1.96821				
total avg	of distance	108.36667				
total avg	of accuracy	-1.46667				

http://www.easycalculation.com/statistics/standard-deviation.php