﻿ Python Math: Calculate the standard deviation - w3resource # Python Math: Calculate the standard deviation

## Python Math: Exercise-57 with Solution

Write a Python program to calculate the standard deviation of the following data.

Sample Solution:-

Python Code:

``````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 stan. 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

# calculate average
for el in ls:
mean = mean + float(el)
mean = mean / float(n)

return mean

data = [4, 2, 5, 8, 6]
print("Sample Data: ",data)
print("Standard Deviation : ",sd_calc(data))
```
```

Sample Output:

```Sample Data:  [4, 2, 5, 8, 6]
Standard Deviation :  2.23606797749979
```

Pictorial Presentation: Flowchart: Python Code Editor:

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