Both pubescence density and soluble sugar were negatively related to non-preference, while the free amino acids and thickness of epidermal cell positively.
叶毛密度和可溶性糖含量与不选择性呈负相关，游离氨基酸和表皮层细胞厚度与不选择性呈正相关。
2
In the case of Web polls, I am using a non-parametric analysis procedure because Web polls often use a nominal scale to record voter preference.