Calculating the interquartile range (IQR)

The  exercise appears under the 6th grade (U.S.) Math Mission. This exercise calculates the interquartile range (IQR) of a data set.

Types of Problems
There is one type of problem in this exercise:


 * 1) Find the interquartile range of the data set: This problem has a collection of data and a command to find the spread of the data set. The student is asked to calculate the interquartile range and write it in the space provided.Ctiqr1.png

Strategies
Knowledge of statistical vocabulary and the ability to do basic statistical calculations are encouraged to ensure success on this exercise.
 * 1) The interquartile range is the range (difference) between the quartiles.
 * 2) The quartiles are the medians of the top and bottom halves of the data.
 * 3) A calculator can be used to find the quartiles, which can lead to finding the IQR efficiently.
 * 4) Data can be provided in charts or in dot plots.

Real-life Applications

 * 1) Data and statistics appear in news reports and in the media every day.
 * 2) Many of the problems in this exercise could be viewed as real-life applications.
 * 3) Statistics can be seen more frequently than calculus in every day life.