Set X consists of 100 numbers. The average (arithmetic mean) of set X is 10, and the standard deviation is 4.6. Which of the following two numbers, when added to set X, will decrease the set`s standard deviation by the greatest amount?
-
A-100 and -100
-
B-10 and -10
-
C0 and 0
-
D0 and 20
-
E10 and 10
显示答案
正确答案: E