Statistical Inference

Inference

Estimate population parameters, test hypotheses, assess distributional assumptions, and run rank-based procedures using pasted raw data or summary statistics.

Hypothesis Test for Two Proportions

Test equality of two population proportions with a pooled z test.

Interactive inference

Input mode

Raw data Summary statistics

Data

Paste two columns of binary 0/1 observations. Blank cells are allowed for unequal sample sizes.

Sample 1

Successes x₁

Sample size n₁

Sample 2

Successes x₂

Sample size n₂

H₀ is fixed at p₁ − p₂ = 0 for the standard pooled two-proportion z test.

Alternative hypothesis

Confidence level (%)

Enter the confidence level as a percentage. Example: 95 means 95% confidence and implies α = 0.05.

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Ready to calculate

Choose the input mode, paste data or enter summary statistics, then press Calculate.