NumPy - Aggregation Functions
Which of the following is the correct syntax for
np.mean() to calculate the mean of a NumPy array named arr?Which of the following is the correct syntax for np.mean() to calculate the mean of a NumPy array named arr?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the standard NumPy function for mean
The correct function to calculate mean in NumPy isnp.mean(), which takes the array as an argument.Step 2: Check other options
mean(arr)is not defined without importing;arr.mean()is valid but not the function asked;np.average(arr)is similar but not the exact function requested.Final Answer:
np.mean(arr) -> Option AQuick Check:
Use np.mean(array) for average [OK]
Quick Trick: Use np.mean(array) to get average quickly [OK]
Common Mistakes:
- Calling mean() without np prefix
- Using arr.mean() instead of np.mean(arr)
- Confusing np.mean() with np.average()
Master "Aggregation Functions" in NumPy
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