the weekly statistics bitchfest

I'm trying to be good and go through my notes to make a master list of formulas and when it's appropriate to use them, and I've discovered something that hasn't caused me this much frustration since... well, since my last math class, shock.

I have in my notes a formula.  I have no name for this formula.  I assume it has to do either with the formla before it (in the notes) or directly after it.  I'm not sure.  Thankfully I sit next to a patient classmate who happens to be a whiz at this stuff.  I plan on getting to class early and asking him WTF it's for.

I also have a formula that randomly mentions a value designated as r2. Actually, the "2" is superscript, so it looks like r-squared, except I'm pretty sure the formula isn't figuring r-squared, but rather a second r-value, which I think has to do with rate of return.  Again, the formula's unlabeled.  *taps fingers*  I can't keep doing this -- writing down formulas and not naming them.  I don't remember wtf it's for.

I'm also getting pretty annoyed with the prof for referencing things and formulas that either aren't in our book or are called by another name.  I tried looking up the term "geometric average" in the book and came up with zilch.  Either the book is very bad or the professor is.  I'm not sure which just yet.  I mean, is it that hard to tell us what a formula is used to figure out?  (I seriously think he didn't tell us, because I am goddess of notetaking in that class.)

*headdesk*

I did, however, get a new calculator to help me muddle through this class.  The old one died a horrible flaming death.

...

Well, not really.  It told me it needed new batteries, and when I put new batteries in it, it kept insisting it needed new batteries.  I told it, "I don't have time for this shit," but it just kept blinking "LOW BATTERY" at me, and I was kind of pissed because lithium batteries?  Not cheap.  Especially when the little bastard needs four of them.  So I got a new calculator, and it's pretty spiff.  It was also only $12, which makes it even spiffier.

But it's really cool -- it lets me keep track of the numbers I'm adding, and if I screw up and hit the wrong digit there's a "delete" key so I don't have to clear them all out and start from scratch, which is something that happens more often than I'm comfortable admitting. There's also an "insert" key.  I have much love for this little piece of technology. 

Bleh.  Add to this a slight breakout, somewhat tight jeans, and unexplanable (except not really) irritation, and it'll be a fun class tonight.  I want a nap. XP