Contributor: Meghan Vestal. Lesson ID: 11279
Do you feel at home with finding the range of a series of data? We can arrange to help you with that! A rap video and some online practice give you a range of options for learning this simple system!
What do you think the range is for this set of data:
2, 5, 2, 3, 3
Let's move into this lesson to see if you are correct!
Throughout this Interpreting Data series, you have learned to find the mean, median, and mode.
Review what you have learned so far by listening to 3M's - Mean, Median and Mode Rap | Mister C (Learning Science is Fun):
Find the mean, median, and mode for the following set of data. Check your work using a calculator. Then, have a teacher or parent confirm your work to make sure it is accurate:
112, 103, 126, 111, 111, 110, 122, 115, 112, 102
For this set of data, you should have found the mean is 112.4, the median is 111.5, and the mode is 111 and 112.
If any of your answers were incorrect, make sure to go back and review the previous Related Lessons, found in the right-hand sidebar, before moving forward with this lesson.
Now, you will learn to find the range for a set of data. Based on what you know about the term "range," what do you think this term may mean in math? Discuss your ideas with a teacher or parent.
In math, the range is the distance between the lowest and highest number in a set of data.
Let's start by looking at the same problem we have used throughout this series. The following table shows the number of goals scored in each of Josie's soccer games this season. Before you learn how to find the range, make a prediction about what you think the range is for this set of data. Explain your thoughts to a teacher or parent:
Game |
Goals Scored |
Game #1 |
2 |
Game #2 |
5 |
Game #3 |
2 |
Game #4 |
3 |
Game #5 |
3 |
To find the range for this set of data, start by putting the numbers in order from least to greatest:
After you have put the numbers in order from least to greatest, the only numbers you need to look at are the smallest and biggest numbers:
Subtract the smallest number from the biggest number:
The range for this set of data is 3 because there is a distance of three from the smallest to the biggest number. Did you guess three?
Want to try out some problems involving range? Move on to the next section to practice.
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