Bird
0
0

The code below is intended to print the standard deviation of data. What is wrong?

medium📝 Debug Q14 of 15
NumPy - Aggregation Functions
The code below is intended to print the standard deviation of data. What is wrong?
import numpy as np
data = [1, 2, 3, 4, 5]
print(np.std(data, ddof=1))
ANothing is wrong; code runs correctly
B<code>ddof</code> is not a valid argument for <code>np.std()</code>
CThe code will raise a TypeError because <code>data</code> is a list, not an array
DThe code calculates variance, not standard deviation
Step-by-Step Solution
Solution:
  1. Step 1: Check if ddof is valid for np.std()

    The ddof parameter (delta degrees of freedom) is valid for np.std() and adjusts divisor for sample standard deviation.
  2. Step 2: Check if input type is acceptable

    np.std() accepts lists and converts them internally to arrays, so no error occurs.
  3. Final Answer:

    Nothing is wrong; code runs correctly -> Option A
  4. Quick Check:

    ddof works with np.std() and lists accepted [OK]
Quick Trick: ddof works with np.std() for sample std [OK]
Common Mistakes:
  • Thinking ddof is invalid for standard deviation
  • Assuming lists cause errors in NumPy functions
  • Confusing variance and standard deviation

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More NumPy Quizzes