comparing my first group (which includes 11 blood samples for males and for females) against 2 fix values ei 2mg/ml for females and a 10mg/ml for males.

should I just be comparing the means. Any clues would help Thank you.

Hi Yennj,

First, you need to start from the

**beginning**, you need to define

** what do you want to check**.

The statistics is only a tool, it doesn't determine the question...you should do.

It sounds like a classic one-sample t-test, two separate tests, not a comine one ... (if meet the test assumptions)

So for females:

H0: Mean= 10mg/ml

H1: Mean!=10mg/ml

and a similar test for males:

H0: Mean= 2mg/ml

H1: Mean!=2mg/ml

I showed the two-tailed assumptions, but one tail or two depending on the question.

You can look at the following example and find later how to do the same with SPSS

http://www.statskingdom.com/130MeanT1.html