WHAT IS AN INTEGER?
           Integers can be thought of 
           as discrete, equally spaced 
           points on an infinitely long 
           number line. (Nonnegative 
           integers (purple) and 
           negative integers (red)).  
           Integers are not ever 
           fractions or decimals in 
           simplest form.
   MEAN - the number found 
   when the sum of two or more 
   numbers is 
   divided by the number of 
   addends 
    PRACTICE!   FIND THE MEAN OF THE 
    FOLLOWING SET OF NUMBERS:
   in the sum; also called the 
   average.
 12,  13,  13,  17,  2015    
   MEDIAN - the middle number 
   (or the average of the two 
   central numbers) of a list of 
   data when the numbers are 
   arranged in order from the 
   PRACTICE!   FIND THE MEDIAN OF THE FOLLOWING 
   least to greatest.
   SET OF NUMBERS:
   8, 14, 6, 18, 3, 3,         10
   12, 16
   MODE - the number that 
   appears most often in a list of 
   data.
   ??? I have some questions for 
   you!
  1.  Can a data set have no 
  mode?             2, 2, 4, 4, 7, 7, 10, 10
               7, 9, 10, 11, 15
  2.  Can a data set have more 
  than one mode?
              3.5,  6,  6,  7.3,  8.1,  
  8.1
  3.  Is there a limit to the 
  number of modes in a data 
  set?
    RANGE - the difference 
    between the largest number and 
    the smallest number in a list of 
    numbers.
      What mathematical operation is 
    indicated by the word "difference?"
   54,  59,  64,  74,  74,  74,  79,  84,  89,  94,  
   94,  100,  100