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Z-Score Calculator

Estimator

Calculate the Z-score for a value in a normal distribution.

Value (x)

Population Mean (μ)

Standard Deviation (σ)

About This Tool

Z-scores standardize data to show how many standard deviations a value is from the mean. A z-score of +1.96 marks the 97.5th percentile in a normal distribution — the threshold for 95% confidence in statistical testing.

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