How to perform two samples z test in Doronix Math Toolbox?

[James L.]

I'm using Doronix Math Toolbox. But I can't find how to perform 2 samples z test there. Can anyone help me?

Thank you very much.

 

[Dason]

Why do you want to do a two sample z-test?

 

[James L.]

Why do you want to do a two sample z-test?

I thought it will be better. I have two samples, I know populations std and mean. What should I use? Two samples z-test or t-test.

 

[Dason]

If you know the population standard deviation and mean why do you need to do a test?

 

[James L.]

If you know the population standard deviation and mean why do you need to do a test?

I need to know are these samples different or not. Why do we need two samples z-test?

 

[Dason]

Well if you're interested in if the samples are different and you're saying that you aren't sure if they have the same mean/sd as the population then just use the two sample t-test. It sounds like you want to choose the "Independent samples T test" in your menu.

 

[James L.]

Thanks a lot