(1)P134 Mathematical Expressions下的第二条中的最后一句话:T is the tens digits of a two-digit positive integer,so T is an integer from 1 to 9。 这个不是说2位数么~是我理解出问题了么? (2)P140 倒数第三条, “the mean of a continuous random of varible X” 与“the median of X”的区别是啥~,我愣是没看明白
OG原话是:The mean of a continuous random varible X is the point m on the X-axis at which region under the distribution curve would perfectly balance if a fulcrum were placed at X=m The median of X is the point M on the X-axis at which the line X=M divdes the region under the distribution curve into two regions of equal area.