Mean Average

Key Stage 3

Meaning

A mean average is when you add up all the numbers and divide by the number of numbers.

About a Mean Average

A mean average is used in science to reduce the effects of random errors in the results of an experiment.

Calculating a Mean Average

Results: 5,3 \[Average = \tfrac{5+3}{2}\] \[Average = 4\]

Results: 7.0, 6.8, 7.8 \[Average = \tfrac{7.0+6.8+7.8}{3}\] \[Average = 7.1\]

Results: 12.3, 11.7, 11.4, 12.1 \[Average = \tfrac{12.3+11.7+11.4+12.1}{4}\] \[Average = 11.875\] \[Average = 11.9\]