以下是引用longlyfall在2010-6-7 15:34:00的发言:
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]
95% confidence interval means for 95% of time, the population mean will be contained in the interval. |