import type { Trial, TrialStats } from "../config/types.js";
export type { TrialStats };
/**
 * Computes Wilson score interval for a proportion.
 * Superior to normal approximation for small N and proportions near 0 or 1.
 *
 * @param passes - Number of successes
 * @param total - Total number of trials
 * @param z - Z-score for the desired confidence level (default 1.96 for 95% CI)
 */
export declare function wilsonInterval(passes: number, total: number, z?: number): {
    readonly low: number;
    readonly high: number;
};
/** Computes aggregate statistics for all trials of a single case. Filters the full trial array by `caseId`, then computes pass rate, mean score, standard deviation, Wilson confidence intervals, and flakiness. */
export declare function computeTrialStats(trials: readonly Trial[], caseId: string): TrialStats;
/**
 * Computes trial stats per case. Returns undefined for single-trial runs.
 */
export declare function computeAllTrialStats(trials: readonly Trial[], trialCount: number | undefined): Record<string, TrialStats> | undefined;
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