GRE
$$\frac{n+1}{n+2}$$
$$\frac{1}{2}$$
x
y
The standard deviation of the 16 integers that are not equal to m
s
The standard deviation of the five numbers 10, 30, 50, 70, and 90
The standard deviation of the five numbers 10, 45, 50, 55, and 90
25000 +道题目
256本备考书籍