Two-Sample Tests — Compare Two Means or Two Proportions

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StatisticsCommon Core VAR-7.AINFVerified correct ✓

Worked examples

Group 1: n₁ = 150, x₁ = 98 successes (p̂₁ = 0.6533). Group 2: n₂ = 150, x₂ = 38 successes (p̂₂ = 0.2533). The null hypothesis is H₀: p₁ = p₂. Compute the two-proportion z test statistic using the pooled proportion.
Answer: 6.9586

Group 1: n₁ = 100, x₁ = 30 successes (p̂₁ = 0.3000). Group 2: n₂ = 150, x₂ = 90 successes (p̂₂ = 0.6000). The null hypothesis is H₀: p₁ = p₂. Compute the two-proportion z test statistic using the pooled proportion.
Answer: -4.6513

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Hypothesis Test for a Mean — One-Sample t-Test Hypothesis Test for a Proportion — One-Sample z-Test

Two-Sample Tests — Compare Two Means or Two Proportions

Worked examples

Master Two-Sample Tests — Compare Two Means or Two Proportions

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