:ֲ̬֮

ʽ:
NormalIntervalStdTwo(x,y)
NormalIntervalStdTwo(x,y,a)

x:ĵһ
y:ĵڶ
a:Ŷ,ĬΪ0.95

ִϷxy֮ȵ

ע:

1ı

2Ƿ֮ȵ

:
