Box Plots
 Box plots and their parameters are generally used if data is not known to be normal and they assist in displaying how the
data is distributed.

 The most basic parameters for a boxplot are:
 x_{low}, x_{min}, lowest score,
 1st quartile (Q_{1}, 25th percentile, median of the lower 50% of all data),
 2nd quartile (Q_{2}, median, 50th percentile),
 3rd quartile (Q_{3}, 75th percentile, median of the upper 50% of all data),
 x_{high}, x_{max}, highest score,
 inner quartile range, IQR, Q_{3}  Q_{1}.
 Box plots are usually drawn to scale so the relationship between the data points is visible. Draw the number line first, then,
create the box plot.
 Here's an example.

 As with any boxplot, the middle 50% of all the data points fall in the inner quartile range, Q_{3}  Q_{1}. In
this case the IQR is 83, or 5.
