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Mean, Median, Mode & Range

Mean, Median, Mode & Range. Mean, Median, Mode are all types of average. An average summarises groups of data. Mean. Average often means the ‘mean’ Mean = total of the numbers divided by how many numbers. Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6 Add up the numbers:

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Mean, Median, Mode & Range

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  1. Mean, Median, Mode & Range

  2. Mean, Median, Mode are all types of average. An average summarises groups of data.

  3. Mean • Average often means the ‘mean’ • Mean = total of the numbers divided by how many numbers. Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6 Add up the numbers: 3 + 5 + 5 + 6 + 4 + 3 + 2 + 1 + 5 + 6 = 40 Divide by how many numbers: 40 ÷ 10 = 4 The class mean shoe size is 4

  4. Median • Median is the middle value • Put the numbers in order • Choose the number in the middle of the list. • If there are 2 numbers in the middle then it is halfway between them. Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6 Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6 The class median shoe size is 4.5

  5. Mode • Mode is the most common number • Put the numbers in order • Choose the number that appears the most frequently. • Sometimes there may be more than one mode. Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6 Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6 The class modal shoe size is 5.

  6. Range • Range is how far from biggest to smallest. • Put the numbers in order • Take the smallest number from the largest. Class shoe sizes: 3, 5, 5, 6, 4, 3, 2, 1, 5, 6 Put in order: 1, 2, 3, 3, 4, 5, 5, 5, 6, 6 Subtract smallest from largest: 6 – 1 = 5 Range: 5

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