Box plots, also known as box ... The whiskers are lines extending from Q1 and Q3 to end points that are typically defined as the most extreme data points within Q1 − 1.5 × IQR and Q3 + 1.5 × ...

Figure 4: Box plots are a more communicative way to show sample data. Data are shown for three n = 20 samples from normal distributions with s.d. σ = 1 and mean μ = 1 (A,B) or 3 (C).