This is a Mathematica list. It contains five elements, each of which corresponds to the mean front positions measured at a different threshold density, respectively: 45, 60, 75, 90 and 105 1/cm. The m
Data are means ± SE. Data analysis is by two-way ANOVA (Expected Means Squares approach) with mean comparisons by Tukeys HSD: means not sharing a superscript are different at p≤0.05. P values in bold
