Averages In Tables
Mean
To calculate the mean, add the values together and divide the total by the number of
values.
Median
Long method of Solving -
Check Cumulative Frequency Document for a shorter method!
Place the numbers in order from smallest to the biggest. the median number will be
the middle number in the ordered sequence. This is achieved by cancelling each
number from each side until you reach the one middle number.
If 2 middle numbers are left, add both of them and divide the sum by 2.
a+b/2
Median = middle value
Using Stem and leaf diagram is useful:
Remember: ALWAYS REARRANGE THE VALUES IN ASCENDING ORDER
Mode
The mode is the value that occurs most often. The mode is the only average that can
have no value, one value or more than one value. When finding the mode, it helps to
order the numbers first.
Mode = Most common value
Mean
To calculate the mean, add the values together and divide the total by the number of
values.
Median
Long method of Solving -
Check Cumulative Frequency Document for a shorter method!
Place the numbers in order from smallest to the biggest. the median number will be
the middle number in the ordered sequence. This is achieved by cancelling each
number from each side until you reach the one middle number.
If 2 middle numbers are left, add both of them and divide the sum by 2.
a+b/2
Median = middle value
Using Stem and leaf diagram is useful:
Remember: ALWAYS REARRANGE THE VALUES IN ASCENDING ORDER
Mode
The mode is the value that occurs most often. The mode is the only average that can
have no value, one value or more than one value. When finding the mode, it helps to
order the numbers first.
Mode = Most common value
