Ok, so I'm reviewing for the quiz tomorrow, and I have a quick question regarding an example that I set up for myself.
I have written down a table with the following values (PDFs, if you will): P(1) = 0.5, P(2) = 0.4, and P(3) = 0.3. I proposed that P(x < P(3)) = P(1) + P(2) + P(3). Is that right?
In that, could I also say that P(x > P(3)) = 1 - P(1) + P(2) + P(3)?
Also, I'm kind of confused between the two types of Distribution Functions. If what I have written in my notes is correct, a PDF is what I have above (the "P(1) = 0.5, P(2) = 0.4, and P(3) = 0.3") and a CDF is just a sample from <b>that</b> population; a measure of the probability of obtaining a value within the total set. Is this correct?