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Mean

Maths: Year 5 & 6 National Curriculum, topic 9.2.1

The Mean

Finding the mean of a number, means you are finding the average.

Working out the mean

Working out the mean

  • To work out the mean, you need to add together all the pieces of data you have.
  • You then need to divide by how many pieces of data you have.
Mean example

Mean example

  • These are the shoe sizes of 5 friends.
  • Work out the mean of the shoe sizes.
Step 1

Step 1

  • Add together all the friends' shoe sizes.
Step 2

Step 2

  • Divide by how many pieces of data you have.
Answer

Answer

  • The friends' mean shoe size is size 6.

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