### The Box Plot

- The
**box plot** is a graphical tool used to analyse the shape, spread and outliers of a numerical distribution. - It consists of a box with the bottom drawn at the value of quartile 1 and the top at quartile 3, a line drawn through the box at the median and a line either end of the box drawn to the lower and upper fences.
- If the median line is in the middle of the box, the distribution is
**approximately symmetric**, if it is drawn closer to the bottom of the box, it is **positively skewed**, if it is drawn closer to the top of the box, it is **negatively skewed**. - If the distribution has any outliers, they are represented as dots or crosses at their respective value along the y-axis and placed parallel to box.

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