# Five Number Summary

Taught by MrBurnett
• Currently 4.0/5 Stars.
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Meets NCTM Standards:
Lesson Summary:

In this lesson, you'll learn how to calculate the five number summary of a set of data values. This includes the maximum and minimum values, the median, and the upper and lower quartiles. The quartiles divide the data set into quarters, making it easier to interpret and visualize. The interquartile range is a better measure of how spread out your data is than the range, and the box and whisker plot is a useful visual representation of the distribution of your data.

Lesson Description:

How to find the five number summary of a list of data values. Median, upper and lower quartiles, maximum and minimum.

• What is a five number summary?
• What is the median of a data set?
• What is an easy way to find the median of a data set with an odd or even number of results?
• What is LQ or Q1 and how do you find the lower quartile of a data set?
• What is UQ or Q3 and how do you find the upper quartile of a data set?
• What are the minimum and maximum values of a data set?
• What are the five numbers in a five number summary of a data set?
• How do you find the median if there are an even number of data values?
• How do you find the quartiles of a data set if there are an odd number of data values?
• What does the five number summary of a data set tell you?
• How do you find the range of a data set?
• What is the inner-quartile range of a data set and how do you calculate it?
• What is a box and whisker plot and what does it look like?
• What do the lines stand for on a box and whisker plot?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson explains what a five number summary of a data set is and how to find this summary. The steps necessary for this method are explained very clearly. This is a great tutorial for this topic. Several example data sets are used and a five number summary is calculated and explained.