学会计算均值,中数和众数;
Learn to calculate mean, median, and mode;
对于给定的分数分布,确定如何选用适宜的集中量数;
Learn how to choose the appropriate central tendency for a given score distribution;
学会计算标准差,四分位距和全距;
Learn to calculate standard deviation, interquartile range, and full range;
对于给定的分数分布,确定如何选用适宜的差异量数。
Learn how to choose the appropriate variability for a given score distribution