old_contents: import { sum } from './sum'
  
  
  /**
   * Returns the mean of the given list of numbers.
   *
   * @func
   * @memberOf R
   * @since v0.14.0
   * @category Math
   * @sig [Number] -> Number
   * @param {Array} list
   * @return {Number}
   * @see R.median
   * @example
   *
   *      R.mean([2, 7, 9]); //=> 6
   *      R.mean([]); //=> NaN
   */
  export function mean(list) {
    return sum(list) / list.length
  }
new_contents: import { sum } from './sum'
  
  
  /**
   * Returns the mean of the given list of numbers.
   *
   * @func
   * @category Math
   * @sig [Number] -> Number
   * @param {Array} list
   * @return {Number}
   * @see R.median
   * @example
   *
   *      R.mean([2, 7, 9]); //=> 6
   *      R.mean([]); //=> NaN
   */
  export function mean(list) {
    return sum(list) / list.length
  }
subject: fix doc