Statistics Resources and Worksheets

#1
Hi,

I am doing an exam and would like more practice.

I thought I saw a sticky on here, similar to the one titled, "Info for R users (Links, Manuals, Books, etc.)," where there were different manuals for statistics and worksheets.

Was I dreaming or is there something like this on here?

Just not sure how reputable Wikipedia is or what I should trust for a second explanation?

Know of any resources to practice?