/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

68 votes107 views6 answers
Python open file
Python
17 votes111 views6 answers
How to append to a list in python
Python
1 vote132 views1 answer
How to iteratively create a grid within a bigger grid in python
Python
0 vote101 views1 answer
# Import KNeighborsClassifier from sklearn.neighbors
Python
0 vote95 views1 answer
Pyspark dataframe to parquet
Python
6 votes103 views1 answer
Excute a command using py in cmd
Python
0 vote113 views1 answer
Get processor model in python
Python
14 votes114 views2 answers
Check dictionary is empty or not in python
Python
9 votes116 views1 answer
Install matplotlib conda
Python
5 votes100 views2 answers
Convert response to json python
Python