Sometimes we have to estimate the interquartile range from a cumulative frequency diagram. It is acceptable when dealing with an even total cumulative frequency to use LQ = \(\frac{n}{4}\) ...

To find the interquartile range, subtract the value of the lower ... She arranges the data from smallest to largest. A box plot is a diagram which provides a quick visual summary of the ...

(4), it was stated that, in contrast to the box, the definition of the so-called “whiskers” in the box plot diagram is not ... as one and a half times the interquartile distance.