Python Program to Calculate the Variance

Python program to find variance; In this tutorial, you will learn how to find or calculate the variance in python using numpy.

Python Program to Calculate the Variance

• Write a program to calculate variance in python.
• Python calculate variance without numpy

Write a program to calculate variance in python

import numpy as np

dataset= [21, 11, 19, 18, 29, 46, 20]

variance= np.var(dataset)

print(variance)

Output

 108.81632653061224 

Note:- Python variance() is an inbuilt function that is used to calculate the variance from the sample of data (sample is a subset of populated data). Python statistics module provides potent tools, which can be used to compute anything related to Statistics.

Python calculate variance without numpy

#define a function, to calculate variance
def variance(X):
    mean = sum(X)/len(X)
    tot = 0.0
    for x in X:
        tot = tot + (x - mean)**2
    return tot/len(X)

# call the function with data set
x = [1, 2, 3, 4, 5, 6, 7, 8, 9] 
print("variance is: ", variance(x))

y = [1, 2, 3, -4, -5, -6, -7, -8] 
print("variance is: ", variance(y))

z = [10, -20, 30, -40, 50, -60, 70, -80] 
print("variance is: ", variance(z))

Output

variance is:  6.666666666666667 
variance is:  16.5 
variance is:  2525.0 

Recommended Python Programs

1. Python Program to Add Two Numbers
2. Python Program to Find/Calculate Sum of n Numbers
3. Python Program to Find/Calculate Average of 3, 4, 5…n numbers
4. Python Program to Print ASCII Value of Character
5. Write a Program to Calculate Simple Interest in Python
6. Python Program to Compute Compound Interest
7. Leap Year Program in Python
8. Python Program to Print Star Pattern
9. Number Pattern Programs in Python
10. Python Program to Print Even and Odd numbers From 1 to N
11. Python Abs() Function: For Absolute Value
12. How to Check Whether a Number is Fibonacci or Not in Python
13. Python: Program to Find Power of Number
14. Python Program to Reverse a Numbers
15. Python Program to Find Smallest/Minimum of n Numbers
16. Python Program to Find Largest/Maximum of n Numbers
17. Python Program to Find The Net Bill Amount After Discount
18. Python Program to Print Numbers From N to 1 and 1 to N
19. Python Program to Print Numbers Divisible by 3, 5, 7
20. Python Program to Print Prime Number 1 to N
21. How to Find Square of Number in Python
22. Python Program to Calculate Cube of Number
23. Python Program to Find LCM of Two Numbers
24. BMI (Body Mass Index) Calculator in Python
25. Palindrome Program in Python using while loop, Function, etc
26. Python: Program to Count Total Number of Bits in Number
27. Python Random Number Generator Code
28. Python Program to Calculate n-th term of a Fibonacci Series
29. Zip Zap Zoom Python Program
30. Python: program to convert Celsius to Fahrenheit
31. Python Program to Swap Two Numbers
32. Python Program to Convert Meters into Yards, Yards into Meters
33. Python Program to Convert Kilometers to Meters, Miles
34. Python Program to Find Perfect Number
35. Python: Program to Find Strong Number
36. Python Program Create Basic Calculator
37. Python Program For math.floor() Method
38. Python Program to Find Sum of Series 1/1! 2/2! 3/3! …1/n!
39. Python: Program to Convert Decimal to Binary, Octal and Hexadecimal
40. Python Program to Find Roots of Quadratic Equation
41. Python Program to Print Alphabets from A to Z in Uppercase and Lowercase
42. Python Program to Check Given Input is Alphabet, Number or Special Character
43. Python Program to Check IF a Number is Power of Another Number
44. Python Check Binary Representation of Given Number is Palindrome or Not
45. Python Program to Draw a Pie Chart
46. Python Program Input the Radius of Circle and Compute the Area
47. Python Program to Calculate the Area of a Rectangle
48. Python Program to Calculate Area of Triangle
49. Python Program to Find Area and Circumference of Circle using Radius
50. Python Program that Accepts Marks in 5 Subjects and Outputs Average Marks
51. Python Program to Print Binary Value of Numbers From 1 to N