[Solved] Identify the mistake in this code:import numpy as np arr = np.array([1, 2, 3, 4, 5]) variance = np.var(arr, ddof=1) print(variance) | NumPy

NumPy - Aggregation Functions

Identify the mistake in this code:

import numpy as np
arr = np.array([1, 2, 3, 4, 5])
variance = np.var(arr, ddof=1)
print(variance)

AMissing import statement

Bnp.var() does not accept ddof parameter

Cddof=1 calculates sample variance, not population variance

DVariance cannot be calculated on integer arrays

Step-by-Step Solution

Solution:

Step 1: Understand ddof parameter
ddof=1 changes divisor to N-1, calculating sample variance.
Step 2: Check if this is a mistake
If population variance is intended, ddof should be 0 or omitted.
Final Answer:
ddof=1 calculates sample variance, not population variance -> Option C
Quick Check:
ddof=1 means sample variance [OK]

Quick Trick: ddof=1 means sample variance, ddof=0 means population [OK]

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