HomeOne Sample Z-Test Calculator One Sample Z-Test CalculatorOne Sample Z-Test Calculator Sample Mean (X̄): Population Mean (μ): Population Standard Deviation (σ): Sample Size (n): Significance Level (α): 0.01 (1%)0.05 (5%)0.10 (10%)Custom Alternative Hypothesis: Two-Tailed (≠)Right-Tailed (>)Left-Tailed (<) Calculate Z-Test Reset