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Which numpy function would you use to find the variance of a dataset?

easy📝 Conceptual Q2 of 15
NumPy - Aggregation Functions
Which numpy function would you use to find the variance of a dataset?
Anp.mean()
Bnp.median()
Cnp.sum()
Dnp.var()
Step-by-Step Solution
Solution:

  1. Step 1: Identify the function for variance

    np.var() is the numpy function that calculates variance, the average squared deviation from the mean.

  2. Step 2: Eliminate other options

    np.mean() calculates average, np.sum() adds elements, np.median() finds middle value.

  3. Final Answer:

    np.var() -> Option D

  4. Quick Check:

    Variance function = np.var() [OK]
Quick Trick: Variance is calculated with np.var() in numpy [OK]
Common Mistakes:
  • Using np.mean() for variance
  • Confusing sum with variance
  • Using median instead of variance

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