/Python/Finding the Variance and Standard Deviation of a list of numbers in Python

Finding the Variance and Standard Deviation of a list of numbers in Python

# Finding the Variance and Standard Deviation of a list of numbers

def calculate_mean(n):
    s = sum(n)
    N = len(n)
    # Calculate the mean
    mean = s / N 
    return mean 

def find_differences(n):
    #Find the mean
    mean = calculate_mean(n)
    # Find the differences from the mean
    diff = []
    for num in n:
        diff.append(num-mean)
    return diff

def calculate_variance(n):
    diff = find_differences(n)
    squared_diff = []
    # Find the squared differences
    for d in diff:
        squared_diff.append(d**2)
    # Find the variance
    sum_squared_diff = sum(squared_diff)
    variance = sum_squared_diff / len(n)
    return variance

if __name__ == '__main__':
    donations = [100, 60, 70, 900, 100, 200, 500, 500, 503, 600, 1000, 1200]
    variance = calculate_variance(donations)
    print('The variance of the list of numbers is {0}'.format(variance))
    
    std = variance ** 0.5
    print('The standard deviation of the list of numbers is {0}'.format(std))
#src : Doing Math With Python

Source: scribbr.com

Similar codes

0 vote345 views1 answer
Python construct a string
Python
0 vote361 views1 answer
Increase axis ticks pyplot
Python
0 vote346 views1 answer
Add caption to plot python
Python
1 vote363 views2 answers
Creating lambda expressions in comprehension list
Python
0 vote358 views1 answer
Keras conv2d batchnorm
Python
23 votes327 views1 answer
Python get minute from datetime
Python
0 vote335 views2 answers
Python create adictionary randomly assigning clors to categorical vairables
Python
3 votes429 views1 answer
Django admin prefetch_related
Python Django
0 vote342 views1 answer
Bash: line 1: templates/addtask.html: No such file or directory in flask app
Python
1 vote328 views2 answers
Pygame window at center
Python