Fig. 1. Boxplot of ring specific gravity (RSG) for rings 2–60 at the top of the first
16.5 ft (5 m) log of 46 trees at the highway thinning site. The box represents the
distance between the 1st and 3rd quartiles. The line within the box is the 2nd
quartile (median). The whiskers show the highest and lowest data points or 1.5
times the box (Q3–Q1). Outlier points are those that are greater than 1.5 times
(Q3–Q1).