Eunice's Measures of Central Tendency

Thursday, October 2, 2008
Mean

  • arrange the data in ascending order
  • sum of all data divided by the how many numbers there are
  • when there is an outlier, the mean is less "accurate"
EXAMPLE: 1+2+3+4+5=15/5=3




Median

  • arrange the data in numerical order
  • the middle number
EXAMPLE:1,2,3,4,5,6,7=4


Mode

  • arrange the data in ascending order
  • a number that accurs often

EXAMPLE: 1,2,2,2,3,3,4,4,4,4,4,5,5,6= 4

Range

  • arrange the data in ascending order
  • the greatest number subtracted by the smallest number
  • large range = outlier
EXAMPLE: 4,8,12,16,18,24= 24-4= 20





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