问题如下:
For a normally distributed random variable, the probability that random varible is greater than three standard deviations excess the mean is:
选项:
A.0.0013.
B.0.0228.
C.0.9987.
解释:
A is correct.
1 - F(3) = 1 - 0.9987 = 0.0013.
题目是作对了,但这题好像不用查表也可以吧,3明显大于2.58 ,结果应该是小于1%,可以这么理解么