Question
In hypothesis testing, if the population standard deviation is KNOWN, your graph should be labeled a T or Z line?
In hypothesis testing, if the population standard deviation is NOT KNOWN, your graph should be labeled a T or Z line?
In hypothesis testing, if the population standard deviation is NOT KNOWN, your graph should be labeled a T or Z line?
Answers
MathGuru
If population standard deviation is not known, usually a t-distribution is used.