Calculate the standard deviation of the following dataΒΆ
Calculate the standard deviation of the following data.
Expected output:
Sample Data:
[4, 2, 5, 8, 6]
Standard Deviation:
2.23606797749979
import math
import sys
def sd_calc(data):
n = len(data)
if n <= 1:
return 0.0
mean, sd = avg_calc(data), 0.0
# calculate stand. dev.
for el in data:
sd += (float(el) - mean)**2
sd = math.sqrt(sd / float(n - 1))
return sd
def avg_calc(ls):
n, mean = len(ls), 0.0
if n <= 1:
return ls[0]
# calculate average
for el in ls:
mean = mean + float(el)
mean = mean / float(n)
return mean
# test
data = [4, 2, 5, 8, 6]
print("Sample Data: ", data)
print("Standard Deviation : ", sd_calc(data))
Output:
Sample Data: [4, 2, 5, 8, 6]
Standard Deviation : 2.23606797749979