How to Finding Mean, Median, Mode, and Range: Interpreting Charts

A step-by-step guide to interpreting charts to find mean, median, mode, and range

The mean, median, mode, and range are 4 types of measure.

The mean: To determine the mean, first add numbers and then, divide via the number of numbers in a group. Mean is also known as average.

The mode: To determine the mode, first place the numbers in order from lowest to highest, and then count the number of times each of the numbers happens. The mode is the number that happens the most among the data set.

The median: To determine the median, put numbers in order from the lowest to the highest or vice versa. The median is the middle number of a data set.

The range: To determine the range, put all numbers in order. Then, subtract the smallest number from the biggest. The difference between the greatest and smallest values is the range.

Interpreting Charts to Find Mean, Median, Mode, and Range – Examples

A restaurant kept a record of how many soft drinks it sold each day.

What is the median number of soft drinks?

What is the range of the number of soft drinks?

What is the mode of the number of soft drinks?

What is the mean of the number of soft drinks?

Solution:

Put numbers in order from greatest to smallest.
45,40,36,30,26,26,21
The median is the middle number of a data set. So, it is 30.
The range is the difference between the greatest and smallest values in a data set.
The greatest value is 45 and the smallest value is 21. \(45-21=24\). So, it is 24.
The mode is the number that happens the most among the data set. 26 happen twice. So, it is 26.
To determine the mean, add numbers and then, divide via the number of numbers in a group.
\(45+40+36+30+26+26+21=224\)
\(224÷7=32\). So, it is 32.