--- a/python/utils.py	Fri May 23 17:33:11 2014 -0400
+++ b/python/utils.py	Wed May 28 17:46:38 2014 -0400
@@ -32,7 +32,12 @@
     return (k*stdev/tolerance)**2
 
 def confidenceInterval(mean, stdev, nSamples, percentConfidence, trueStd = True, printLatex = False):
-    'if trueStd, use normal distribution, otherwise, Student'
+    '''if trueStd, use normal distribution, otherwise, Student
+
+    Use otherwise t.interval or norm.interval
+    ex: norm.interval(0.95, loc = 0., scale = 2.3/sqrt(11))
+    t.interval(0.95, 10, loc=1.2, scale = 2.3/sqrt(nSamples))
+    loc is mean, scale is sigma/sqrt(n) (for Student, 10 is df)'''
     from math import sqrt
     from scipy.stats.distributions import norm, t
     if trueStd: