code: public static function NORMSDIST($value)
      {
          $value = Functions::flattenSingleValue($value);
  
          return self::NORMDIST($value, 0, 1, true);
      }
docs: NORMSDIST.
  
  Returns the standard normal cumulative distribution function. The distribution has
  a mean of 0 (zero) and a standard deviation of one. Use this function in place of a
  table of standard normal curve areas.
  
  @param float $value
  
  @return float