Fig. 4
From: The effect of probe geometry on rind puncture resistance testing of maize stalks
Box plots of R2 values for bending strength vs rind penetration resistance categorized by probe geometry. The central line of each box plot indicates the median value. The bottom and top edges of the box indicate 25th and 75th percentiles. Whiskers extend to the most extreme data point. Notches indicate statistical significance (i.e., 95% confidence interval of the median). Notches on the right hand box plot exceed the 25th percentile because of the relatively small sample size