We read the values for the quartiles from the graph and arrive at 38 and 47. You are allowed to be out by a little but be as accurate as you can. So the interquartile range is the difference ...

Let’s examine this a little further by describing the interquartile range. Quartiles can be defined as dividing your data into 4 parts or quarters of approximately equal size. You can define the ...

Reading from the graph, the upper quartile is 47. The interquartile range is the upper quartile – the lower quartile, so for this data the interquartile range is 47 - 38 =9. Back to top Drawing ...