Column_1	Column_2	std_dev_output
0	NaN	NaN
10	0.699122448979592	0.00819386910121741
20	0.690082872928177	0.0115122535939554
30	0.677551515151515	0.0109413102063592
40	0.666219512195123	0.0101950600214193
50	0.656132978723405	0.0102965846401067
60	0.644973684210526	0.010775247788904
70	NaN	NaN