Question

What is the use of Box and Whisker plots?

Answer 1

Let us first understand a Box and Whisker plot first. Sometimes, we need more details in the distribution of data-sets that may not be fulfilled by the measure of central tendency like the mean, median and the mode. This demand can be fulfilled by a box and whiskers plot. A Box plot is a graph that provides us with much firm indication about how the values in the data should be spread.

Complete step by step solution:
Now, we shall see some of the major advantages of Box and Whiskers plot:
(a) The Box plot offers us a visual summary of the data therefore allowing the researchers to identify the mean values, the dispersion of the set and the signs of skewness.
(b) They display the average score of the data set.
(c) The Box plot offers to display the outliers within the data set.
(d) The plot helps us to get more knowledge about the symmetry of the data, that is, when the median is positioned exactly in the middle and the whiskers on both sides are equal, the resulting distribution will be symmetric.
These are some of the key advantages of the Box and Whiskers plot over some other forms of representation.

Hence, the use of Box and Whisker plots has been concluded.

Note:
We can even compare two Box and Whiskers plots by looking at its three aspects. First, the difference in level by comparing the two Boxes. Second, the difference in width of the Boxes will give us the variation in two data sets. Third, the asymmetries, that is, the outliers are most important as they make a huge difference in the skewness.