FizzBuzzPlus CodeYear Challenge

FizzBuzzPlus.js

//FizzBuzzPlus Challenge from CodeYear

var FizzBuzzPlus = { //create an object called FizzBuzzPlus
  
  isFizzBuzzie: function(num) { // Create function isFizzBuzzie with one argument: an integer
 
    if(num % 3 === 0 && num % 5 === 0) {  // return false if the provided integer is a multiple of both 3 and 15
      return false;
    }
    else if ( num % 3 === 0 || num % 5 === 0) { //return true if the provided integer is a multiple of 3 or 15 (not both)
      return true;                              // I know this could be less lines, but this seemed easier to read. 
    }
    else { // otherwise it returns false
      return false; // returns: true or false - boolean
    }
  },
  
  getFizzBuzzSum: function(max) { //takes a maximum integer for search. 
    var sum = 0;
      for(i=0; i<max; i++) { 
        if(this.isFizzBuzzie(i) == true) { //sums all number which are multiples of 3 or 5 but not both, and less than max.
              sum += i;
        }
      }
    //returns: integer sum of all multiples of 3 or 5 but not both, less than max.
    return sum; 
  },
  
  getFizzBuzzCount: function(max){ //same as above, but gets the count rather than the sum. 
    var count = 0;
      for(i=0; i<max; i++) {
          if(this.isFizzBuzzie(i) === true) {
              count++;
          }
      }
    return count; 
  },
  getFizzBuzzAverage: function(val) { //returns average of FizzBuzzie numbers below the supplied value.
      var count = this.getFizzBuzzCount(val);
      var sum = this.getFizzBuzzSum(val);
      var average = sum/count;
      return average;
  }
  
};
 
console.log(FizzBuzzPlus.getFizzBuzzAverage(100)); //test code, prints average of FizzBuzzie numbers below supplied value.