Reference library

Lists & loops

Iterate, transform, and combine sequences with readable loop patterns.

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Lists & loops easy

How to Standardize a List with Z-Score Normalization in Python

This code computes the z-score for each number in a list, standardizing the data to have zero mean and unit variance using the statistics module.

z-score standardization statistics
Python 
import statistics

def z_score_normalize(values):
    """Standardize a list of numbers using z-score normalization."""
    if not values or len(values) < 2:
        raise ValueError("Need at least 2 values for meaningful z-score normalization")
    
    mean = statistics.mean(values)
    std_dev = statistics.stdev(val…
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