import type { WeibullInput, WeibullResult } from './types.js';
/**
 * Weibull Reliability Analysis — Median Rank Regression
 *
 * @formula
 *   - F(i) = (i − 0.3) / (n + 0.4)  (Benard's approximation for median rank)
 *   - Y = ln(ln(1/(1−F))) vs X = ln(t) → linear regression
 *   - β = slope, η = exp(−intercept/slope)
 *   - MTTF = η × Γ(1 + 1/β)
 *   - R(t) = exp(−(t/η)^β)
 *   - B10 = η × (−ln(0.9))^(1/β)
 *
 * @reference Abernethy, R.B. "The New Weibull Handbook", 5th Ed.
 * @reference IEC 61649:2008 — Weibull Analysis
 */
export declare function weibull(input: WeibullInput): WeibullResult;
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