Hypothesis Testing Question

[cre_analyst]

In regards to the denominator, when calculating a test statistic for Z and T tests, when is it appropriate to use:

Standard Deviation/Square Root of N

vs.

Just Standard Deviation

Thanks!

 

[the show NY]

Standard Deviation/Square Root of N

 

[cre_analyst]

I thought there are situations when you divide by just the standard deviation and not the standard error?

 

[beingthatguy]

think thats just when your standardizing