Lab 2 - Woodlot Distribution

Two different trees were picked in the York University woodlot at random which constituted one pair. Trees in the pair were given a designation, a coefficient that indicated the pair number and the variable "a" or "b" which differentiated the trees in a pair. Using a measuring tape the distance between the two selected trees was measured in meters. Subsequently the diameter at breast height of each tree in the pair was measured using a measuring tape in centimeters. Next the condition of each tree within the pair was determined to be "dead", "living" or "flourishing" and was given a rank "0", "1", or "2" respectfully. The condition was determined by estimating the percent of the tree that was covered in green canopy in respect to the tree size. Trees were given rank "0” if only 0-20% of the tree was covered in green canopy in respect to tree size. Trees were given rank "1" if 20-60% of the tree was covered in green canopy in respect to tree size. Trees were given rank "2" if 60% or more of the tree was covered in green canopy in respect to tree size. This entire process was repeated an additional nine time for a total same size of ten.

本数据集的采样流程如下：在约克大学（York University）林地中随机选取两棵不同的树木，组成一组配对样本。为该配对内的两棵树木赋予标识，该标识包含表征配对编号的系数，以及区分组内两棵树木的变量"a"或"b"。使用卷尺以米为单位，测量该配对中两棵树之间的距离。随后使用卷尺以厘米为单位，测量该配对中每棵树的胸径（diameter at breast height）。接下来，对该配对内每棵树的生长状况进行分级判定：划分为"枯亡""存活""繁茂"三个等级，分别对应评分0、1、2。生长状况的判定依据为：基于树木自身体量，估算其绿色冠层的覆盖百分比。若绿色冠层覆盖占树木体量的比例为0%-20%，则评定为等级0；覆盖比例为20%-60%时评定为等级1；覆盖比例达到60%及以上时则评定为等级2。上述完整流程共计重复9次，最终得到总计10组配对样本。