assertThrows(IllegalStateException.class, () -> emptyAccumulator.sampleStandardDeviation());
    assertThrows(
        IllegalStateException.class,
        () -> emptyAccumulatorByAddAllEmptyIterable.sampleStandardDeviation());
    assertThrows(
        IllegalStateException.class,
        () -> emptyAccumulatorByAddAllEmptyStats.sampleStandardDeviation());

    assertThrows(IllegalStateException.class, () -> EMPTY_STATS_VARARGS.sampleStandardDeviation());
    assertThrows(IllegalStateException.class, () -> EMPTY_STATS_ITERABLE.sampleStandardDeviation());
    assertThrows(IllegalStateException.class, () -> ONE_VALUE_STATS.sampleStandardDeviation());
    assertThat(TWO_VALUES_STATS.sampleStandardDeviation())
        .isWithin(ALLOWED_ERROR)
        .of(sqrt(TWO_VALUES_SUM_OF_SQUARES_OF_DELTAS));

    assertThrows(IllegalStateException.class, () -> emptyAccumulator.sampleStandardDeviation());
    assertThrows(
        IllegalStateException.class,
        () -> emptyAccumulatorByAddAllEmptyIterable.sampleStandardDeviation());
    assertThrows(
        IllegalStateException.class,
        () -> emptyAccumulatorByAddAllEmptyStats.sampleStandardDeviation());

   * Double#NEGATIVE_INFINITY}, or {@link Double#NaN}) then the result is {@link Double#NaN}.
   *
   * @throws IllegalStateException if the dataset is empty or contains a single value
   */
  public final double sampleStandardDeviation() {
    return Math.sqrt(sampleVariance());
  }

  /**
   * Returns the lowest value in the dataset. The count must be non-zero.
   *
   * <h3>Non-finite values</h3>
   *

   * Double#NEGATIVE_INFINITY}, or {@link Double#NaN}) then the result is {@link Double#NaN}.
   *
   * @throws IllegalStateException if the dataset is empty or contains a single value
   */
  public double sampleStandardDeviation() {
    return Math.sqrt(sampleVariance());
  }

  /**
   * Returns the lowest value in the dataset. The count must be non-zero.
   *
   * <h3>Non-finite values</h3>
   *