Difference between revisions of "Mean Average"
| Line 1: | Line 1: | ||
==Key Stage 3== | ==Key Stage 3== | ||
===Meaning=== | ===Meaning=== | ||
| − | A '''mean average''' is when you add up | + | 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 Error|random errors]] in the [[results]] of an [[experiment]]. | ||
| + | |||
| + | ===Calculating a Mean Average=== | ||
| + | Results: 5,3 | ||
| + | : <math>Average = \tfrac{5+3}{2}</math> | ||
| + | : <math>Average = 4</math> | ||
| + | |||
| + | Results: 7.0, 6.8, 7.8 | ||
| + | : <math>Average = \tfrac{7.0+6.8+7.8}{3}</math> | ||
| + | : <math>Average = 7.1</math> | ||
| + | |||
| + | Results: 12.3, 11.7, 11.4, 12.1 | ||
| + | : <math>Average = \tfrac{12.3+11.7+11.4+12.1}{4}</math> | ||
| + | : <math>Average = 11.875</math> | ||
| + | In science the answer should be rounded to the same number of [[Significant Figures|significant figures]] as the original numbers. | ||
| + | : <math>Average = 11.9</math> | ||
| + | |||
| + | ===Examples=== | ||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:ResultsTableCalculation.png|center|400px]] | ||
| + | | style="height:20px; width:200px; text-align:center;" |The [[Mean Average|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=== | ===About a Mean Average=== | ||
Revision as of 18:20, 21 March 2019
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. |