How do you calculate p value Posted by Calculator Study March 31, 2025 How to Calculate P-Value: Statistical Significance Calculator P-Value Calculator Left-tailed test Right-tailed test Two-tailed test Calculate Clear P-Value Formula The p-value calculation formula depends on your test statistic and hypothesis test type. For Z-tests: Z = (X̄ - μ) / (σ/√n) Where X̄ = sample mean, μ = population mean, σ = standard deviation, n = sample size. Probability Chance Calculator Post navigation Previous Post Calculate P-ValueNext PostCalculating p value calculator