Mean Average
Contents
Key Stage 3
Meaning
A mean average is when you add up a set of numbers and divide by how many of numbers were added.
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
\(Average = \tfrac{12.3+11.7+11.4+12.1}{4}\)
\(Average = 11.875\) In science the answer should be rounded to the same number of significant figures as the original numbers.
\(Average = 11.9\)
Examples
The average for each set of results can be calculated by adding a row together and dividing by the number of results in that row. |
Key Stage 4
Meaning
A mean average is when you add up a set of numbers and divide by how many of numbers were added.
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
\(Average = \tfrac{12.3+11.7+11.4+12.1}{4}\)
\(Average = 11.875\) In science the answer should be rounded to the same number of significant figures as the original numbers.
\(Average = 11.9\)
Examples
The average for each set of results can be calculated by adding a row together and dividing by the number of results in that row. |
References
AQA
- Averages (means), page 14, GCSE Chemistry, CGP, AQA
- Averages (means), page 14, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
- Averages (means), page 7, GCSE Chemistry; The Revision Guide, CGP, AQA
- Averages, page 13, GCSE Combined Science Trilogy; Physics, CGP, AQA
- Averages, page 14, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
- Averages, page 6, GCSE Physics; The Revision Guide, CGP, AQA
- Averages, pages 260, 262, 281, GCSE Physics; Third Edition, Oxford University Press, AQA
- Averages, pages 262-263, GCSE Biology; Third Edition, Oxford University Press, AQA
Edexcel
- Averages (means), page 14, GCSE Chemistry, CGP, Edexcel
- Averages, page 14, GCSE Physics, CGP, Edexcel
- Averages, page 6, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Averages, page 7, GCSE Biology; The Revision Guide, CGP, Edexcel
- Averages, page 7, GCSE Chemistry; The Revision Guide, CGP, Edexcel
- Averages, page 7, GCSE Physics; The Revision Guide, CGP, Edexcel
- Mean (average), page 6, GCSE Biology; The Revision Guide, CGP, AQA
- Mean (average), page 6, GCSE Biology; The Revision Guide, CGP, AQA
- Mean (average), page 6, GCSE Combined Science; The Revision Guide, CGP, AQA
- Mean (average), page 14, GCSE Biology, CGP, Edexcel
- Mean (average), page 6, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Mean (average), page 7, GCSE Biology; The Revision Guide, CGP, Edexcel