diff --git a/normdist.py b/normdist.py
index ea3456d..db0dd72 100644
--- a/normdist.py
+++ b/normdist.py
@@ -4,12 +4,13 @@ import numpy as np
 import matplotlib.pyplot as plt
 from scipy.stats import norm
 
-mean = 1
-stddev = 5
-lowerbound = -1
-upperbound = 1
-x = np.linspace(-10, 10
-                , 1000)
+data = np.array([1, 1.1, 0.9, 1, 1, 0.9, 0.9])
+lowerbound = 0.9
+upperbound = 1.0
+
+mean = data.mean()
+stddev = data.std()
+x = np.linspace(mean-3*stddev, mean+3*stddev, 1000)
 y = norm.pdf(x, mean, stddev)
 plt.plot(x, y, 'b-', label='Normal Distribution')
 coloredregion = (x >= lowerbound) & ( x <= upperbound ) #select x values