class StudentTTwoTailedCriticalValueCalculator extends Function1D<Double, Double> {

  @Override
  public Double evaluate(final Double x) {
    Validate.notNull(x, "x");
    ArgumentChecker.notNegative(x, "x");
    return _calc.evaluate(0.5 + 0.5 * x);
  }

  public  StudentTTwoTailedCriticalValueCalculator(final double nu);
  public  StudentTTwoTailedCriticalValueCalculator(final double nu, final RandomEngine engine);

}