I have a question on Paired T-tests in statistics, and degrees of freedom. I understand that N-1 is what I need to do. My homework question is confusing though. It asks: A school psychologist takes a group of students and pairs them up, making 12 pairs. He is performing a paired T-test....

Here is my situation. First of all, you should know that I'm on Metformin because I have very irregular periods and am borderline PCOS. Now for the tests. The first day of my last period was Oct 21st. This is not uncommon for me to be this late, but I took a test anyway to see if I was...

I have my road test for my D licence next week out of guelph. I was wondering how they go about testing on the circle checks. Can I have a sheet for referance or are you not able to look at anything.

I usually have irregular periods. They sometimes come every month, and sometimes a/f doesn't come but every other month. I have never gone three months without a/f. I took 4 pregnant. Tests. All urine home pregnancy tests. They all came out negative. I am wondering if I take a blood test, can...

I know everyone says that the best time to take a HPT is first thing in the mornings, but why is that? Aren't they accurate at all times if you have missed your period?