# Box Plot Maker

Instructions: The following graphical tool creates a box plot on the data you provide in the boxes. You can type one or more samples. Please press ‘\’ to start a new sample.

Type the samples (comma or space separated, press ‘\’ for a new sample)
Name of the sample (Separate with commas if more than one. Optional)

What is a boxplot? A box plot is a chart tool used to quickly assess distributional properties of a sample. The so-called box-and-whiskers plot shows a clear indication of the quartiles of a sample as well of whether or not there are outliers.

There are different conventions, but the most common one indicate that the central box limits are determined by the quartiles $$Q_1$$ and $$Q_3$$. Inside of the central box there is line that represents the median (which is the same as $$Q_2$$). The whiskers are expressed in different ways, but one of the most common ways set the limit of the upper whisker as $$Q_3 + 1.5 \times IQR$$, and the limit of the lower whisker as $$Q_1 – 1.5\times IQR$$, where $$IQR$$ is the intequartile range, that is defined as: $$IQR = Q_3 – Q_1$$