Statistics

Plagueis · Oct 23, 2006

My class starts the normal distribution next week, but I have a test later this week on probability, and finding the mean, standard deviation, and variance for binominal distributions. :uhoh3:

JaxiaKiley · Oct 25, 2006

That's the test I just took. I thought I knew what I was doing, but I guess not so much lol

Good luck on your test!

smattles1of2 · Oct 25, 2006

We have our normal distribution test on thurs. Can't wait I have z-scores swimming around in my head!

JaxiaKiley · Oct 26, 2006

I'm having a hard time keeping all these forumulas straight. There are soo many steps to solve every problem! Sheesh. Look it up in the table, Subtract from .5, add to .5...

lol

smattles1of2 · Oct 26, 2006

The teacher taught us how to use our calculators to find z scores and probability but I just like using the table. So much easier!

JaxiaKiley · Oct 26, 2006

OoO -- the calculator? I might have to mess around with that. I didn't pay too much attention to the calculator part.

akspudus · Oct 27, 2006

I have been using a TI-83PLus. It does not do everything for you. You still have to know the concepts. But, once you get it down...no more charts....no more drawing a distribution to make sure you are getting the right region. Because you don't have to memorise the various formulas, it is a lot easier to understand the concepts.

Our text book even has a tutorial for the TI-83 in each section. I downloaded the help application, so I don't even have to memorise what goes where when entering the information into the calculator. Almost feels like cheating, but my professor doesn't think so. Right now I have a 110% in the class....whish I could send some of those points to some of my other classes.

I would STRONGLY recommend to anybody taking statistics...to get one of these calculator. I got mine off of ebay for about $50.

Akspudus

smattles1of2 · Oct 27, 2006

I have a TI-82 and it doesn't do the z-score stuff. I just draw a quick graph and i'm good to go. I was done in 15 min with this last test on z-scores and distribution and the people with the fancy calculators took the whole hour!

akspudus · Oct 28, 2006

I have noticed most people buy these calculators....but never spend the time to learn how they work. They might as well have an adding machine.

Once you get to know your machine, they can save you tons of time. And, like I said you don't have to remember all the formulas.

Normals distribution probabilities and areas....binomial distributions....etc are all a snap.

I highly recommend getting the Catalog Help App it really helps when it comes time to use some of the functions.

Akspudus

JaxiaKiley · Nov 29, 2006

So, did everyone drop? Heh! I have my final in two weeks. I have a 90.3 average right now, so I sure hope I can get an A on my final! Good luck to everyone

smattles1of2 · Dec 1, 2006

I'm still here. We have our final on Tues. Just took the last regular test this week. I have like a 130% average in the class, so i'm not too worried about the final.

Just sold my stat book on amazon for $50 too. Whoo hoo!

JaxiaKiley · Dec 1, 2006

Wow, that's awesome!

I have a 90.3 avg, so I hope I do well enough on the final to get the A. It will cover everything from day one. My test is on the 12th.