export declare interface Grades {
    student: number;
    grade: number;
    percentileRank?: number;
}
export declare class PercentileRanking {
    private _grades;
    _gradeRank: Map<number, number>;
    get grades(): Array<Grades>;
    set grades(gradeArray: Array<Grades>);
    constructor(grades: Array<Grades>);
    /**
     * This calculates the simple percentile rank of all the
     * grades that were provided during the initialization
     * of the object
     */
    simplePercentileCalculation(): void;
    /**
     * This calculates the complex percentile rank of all the
     * grades that were provided during the initialization
     * of the object
     */
    complexPercentileCalculation(): void;
    /**
     * Given a grade, calculate the simple percentile rank for that grade
     * It checks to see if the grade is already included in the initial grade
     * array and if it is, it checks if there is already a value in the cached
     * map. If not, it calculates the rank treating smaller and equal grades with
     * the same coefficient.
     * If the item isn't included in the initial array, it just creates a new array
     * and adds the new item to that array instead of overwriting the initial and
     * proceeds with the same calculation
     * @param {Grades} item
     */
    calculateSingleSimpleRank(item: Grades): void;
    /**
     * Given a grade, calculate the simple percentile rank for that grade
     * It checks to see if the grade is already included in the initial grade
     * array and if it is, it checks if there is already a value in the cached
     * map. If not, it calculates the rank treating smaller grades with
     * the coefficient equal to 1 and the equal grades with a coefficient of 0.5.
     * If the item isn't included in the initial array, it just creates a new array
     * and adds the new item to that array instead of overwriting the initial and
     * proceeds with the same calculation
     * @param {Grades} item
     */
    calculateSingleComplexRank(item: Grades): void;
    /**
     * Given a grades array, this calculates the simple percentile
     * rank of all the grades that were provided
     * @param {Array<Grades>} grades
     */
    static simplePercentileCalculation(grades: Array<Grades>): void;
    /**
     * Given a grades array, this calculates the complex percentile
     * rank of all the grades that were provided
     * @param {Array<Grades>} grades
     */
    static complexPercentileCalculation(grades: Array<Grades>): void;
    /**
     * Given an array of grades, a grade, and an optional cache map,
     * calculate the simple percentile rank of the given grade and
     * save the result to the cache map.
     * @param {Array<Grades>} grades
     * @param {Grades} item
     * @param {Map<number,number>} _gradeRank
     */
    static calculateSingleSimpleRank(grades: Array<Grades>, item: Grades, _gradeRank?: Map<number, number>): void;
    /**
     * Given an array of grades, a grade, and an optional cache map,
     * calculate the complex percentile rank of the given grade and
     * save the result to the cache map.
     * @param {Array<Grades>} grades
     * @param {Grades} item
     * @param {Map<number, number>} _gradeRank
     */
    static calculateSingleComplexRank(grades: Array<Grades>, item: Grades, _gradeRank?: Map<number, number>): void;
}