Hypothesis Test (Z / T) Calculator October 9, 2025 Aman Maths, Uncategorized Test type: One-sample mean (Z, σ known) One-sample mean (T, σ unknown) Two-sample mean (T, pooled / equal variances) Two-sample mean (T, Welch / unequal variances) Tail type: Two-tailed Right-tailed (>) Left-tailed (<) Significance α (in %, e.g., 5 for 0.05): Null mean μ₀: Null difference Δ₀ = μ₁ − μ₂: Input mode: Summary stats (x̄, s/σ, n) Raw data (paste values) Sample mean x̄: Population SD σ (known): Sample SD s (unknown σ): Sample size n: Paste data (comma/space/newline separated): Input mode: Summary stats (x̄, s, n for each group) Raw data for both groups Group 1 x̄₁: s₁: n₁: Group 2 x̄₂: s₂: n₂: Group 1 data Group 2 data Calculate Show Steps Show Details