longlyfall

This is the one I am confused, "95% level of confident means".

one of the answer is "95% of chance population mean lies within the range B???"

but it is definitely wrong. Because population mean is not a variable, it is fixed.

so no matter what range B is, the chance it lie in B is 100% or 0%.

[此贴子已经被作者于2010-6-7 15:34:38编辑过]