Calculating Mean,Median, Mode and Range for a set of Data (7)

Calculate mean, median, mode and range for sets of data. Interpret these statistics in the context of data(ACMSP171)

LO: To calculate the mean, median, mode and range for a set of data.

  • How to add and divide numbers
  • How to order numbers from ascending/descending order
  • How to do a tally table


  • That statistics can be used to help organise data


    • I can calculate the mean for a set of data.
    • I can calculate the median for a set of data.

Visual Representations


Mean is also known as the average. The average shows you what the “typical” amount is.

To find the mean of a data set:

1) add all of the numbers
2) divide by the number of items in the data set.


Median is also known as the middle number when arranged in ascending or descending order. The median shows you what the middle number is that splits the data in half so that half the data is on one side and the other half is on the other.

To find the median of a data set:

1) arrange the numbers in order (ascending/descending doesn’t really matter)
2) find the middle number
3) if there are 2 middle numbers, you will have to find the average between the two numbers.

1 middle number

2 middle numbers


Mode is also known as the “most popular/common” number/item.

Most popular number from the list is 5.


Range is the difference between the lowest (minimum) and highest (maximum) values or the spread of values of your data.

The range shows you how spread out or close the data is.

ACARA Work Samples

Summary Statistics Videos

Student Generated Videos