I am calculating variance of list A
which contains many sublists. However, the output is different from a mathematical calculation. Why is that? I present the current and expected output.
import statistics
A = [[2], [7], [3], [12], [9]]
# Flatten the sublists to get a single list of values
flattened_values = [value for sublist in A for value in sublist]
# Calculate the variance using the statistics module
variance_value = statistics.variance(flattened_values)
print("Variance:", variance_value)
The current output is
Variance: 17.3
The expected output is
13.84
The statistics.variance()
method calculates the variance from a sample of data (from a population)
To calculate the variance of an entire population, look at the statistics.pvariance()
method
import statistics
A = [[2], [7], [3], [12], [9]]
# Flatten the sublists to get a single list of values
flattened_values = [value for sublist in A for value in sublist]
# Calculate the variance using the statistics module
variance_value = statistics.pvariance(flattened_values)
print("Variance:", variance_value)