Docstoc

Range_ Median_ Mean_ Mode

Document Sample
Range_ Median_ Mean_ Mode Powered By Docstoc
					Range, Median, Mean, Mode

           7-5
         246-267
                    Range
• The difference between the greatest number
  and the least number
   Test     1       2     3       4      5

   Score    75      83    92      70     85


     Greatest 92
     Least70
     92-70=22
                           Median
• The middle number when the data is listed
  from least to greatest

Test      1            2            3         4    5


Score     75           83           92        70   85



        Least to Greatest70, 75, 83, 85,92
        Median83
• If you have an even number of data
                48, 56, 63, 64, 64, 65
  – Divide the sum of the 2 middle numbers by 2
  – 63 +64=127
       2 =2
  The median is 63 ½
                   Mean
• The average of the data set
               48, 56, 63, 64, 64, 65
• To find the average:
  – Add the numbers in the set and divide by the
    total number of addends
  48+56+ 63+ 64+ 64+ 65=360
  360÷6=60
  The mean for this data set is 60
                  Mode
• The number that occurs most frequently
              48, 56, 63, 64, 64, 65
• The mode for this set is 64

• Sometimes there is more than one mode
  or there is no mode if there is no mode
  write “no mode” not “0”
     Find the range, median, mean,
           and mode for each
•   96, 88, 81, 80, 85
•   16
•   85
•   86
•   No mode
•   31, 59, 73, 96, 30, 96, 118
•   88
•   73
•   71 6/7
•   96

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:2/14/2012
language:
pages:7