Mean median mode_range

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Mean median mode_range

  1. 1. Mean, Median, Mode &Mean, Median, Mode &RangeRange
  2. 2. Mean, Median, Mode areMean, Median, Mode areall types of average. Anall types of average. Anaverage summarisesaverage summarisesgroups of data.groups of data.
  3. 3. MeanMean Average often means the ‘mean’Average often means the ‘mean’ Mean = total of the numbers dividedMean = total of the numbers dividedby how many numbers.by how many numbers.Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6Add up the numbers:3 + 5 + 5 + 6 + 4 + 3 + 2 + 1 + 5 + 6 = 40Divide by how many numbers:40 ÷ 10 = 4The class mean shoe size is 4
  4. 4. MedianMedian Median is the middle valueMedian is the middle value Put the numbers in orderPut the numbers in order Choose the number in the middle ofChoose the number in the middle ofthe list.the list. If there are 2 numbers in the middleIf there are 2 numbers in the middlethen it is halfway between them.then it is halfway between them.Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6The class median shoe size is 4.5
  5. 5. ModeMode Mode is the most common numberMode is the most common number Put the numbers in orderPut the numbers in order Choose the number that appears theChoose the number that appears themost frequently.most frequently. Sometimes there may be more thanSometimes there may be more thanone mode.one mode.Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6The class modal shoe size is 5.
  6. 6. RangeRange Range is how far from biggest toRange is how far from biggest tosmallest.smallest. Put the numbers in orderPut the numbers in order Take the smallest number from theTake the smallest number from thelargest.largest.Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6Subtract smallest from largest: 6 – 1 = 5Range: 5
  7. 7. RangeRange Range is how far from biggest toRange is how far from biggest tosmallest.smallest. Put the numbers in orderPut the numbers in order Take the smallest number from theTake the smallest number from thelargest.largest.Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6Subtract smallest from largest: 6 – 1 = 5Range: 5

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