columna API reference - v0.5.0
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    Interface PowerOptions

    interface PowerOptions {
        allocation?: number;
        alpha?: number;
        alternative?: Alternative;
        df?: number;
        direction?: "increase" | "decrease";
        effect?: number;
        groups?: number;
        maxN?: number;
        n?: number;
        p0?: number;
        p1?: number;
        power?: number;
        sigma?: number;
        test: PowerTest;
    }
    Index
    allocation? alpha? alternative? df? direction? effect? groups? maxN? n? p0? p1? power? sigma? test
    allocation?: number

    n2 = ceil(n * allocation); two independent samples only. Default 1.

    alpha?: number
    alternative?: Alternative
    df?: number

    Degrees of freedom for chi-square GOF / independence planning.

    direction?: "increase" | "decrease"

    Branch for a two-sided effect search; not the alternative hypothesis.

    effect?: number

    Effect size in the test's natural units: difference in means (z / t tests; with sigma), alternative proportion (1 proportion; with p0) or second proportion (2 proportions; with p1), maximum difference between group means (ANOVA; with sigma, groups), or the ratio σ/σ₀ (1 variance) / σ₁/σ₂ (2 variances). Omit to solve for it.

    groups?: number

    One-way ANOVA: number of groups.

    maxN?: number

    Upper bound when solving for n (default 1e6).

    n?: number

    Sample size per group. Omit to solve for it.

    p0?: number

    1 proportion: hypothesized p₀. 2 proportions: first-group proportion p₁.

    p1?: number
    power?: number

    Target power. Omit to compute it.

    sigma?: number

    Standard deviation for z / t / ANOVA (default 1 → effect in σ units).

    test: PowerTest

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