Comments | matt_rah: Makin' tracks

matt_rah

Makin' tracks

Dec 25, 2007 01:25

So. Much. Snow. So. Deep. So. Fresh.

Wow. I have never skied in powder this deep-it started snowing last night and continued all through the day today. Apparently this is the best early season Big Sky has had in a long while, if not ever. I had a great ski lesson today, too, and really learned a lot about how to handle this deeper stuff ( Read more... )

Comments 13

instigator_ash December 25 2007, 08:03:51 UTC

Yaaay snow! Ours is all melting, but the sledding was good for a while.

I used a TI-83 through 2 or 3 high school classes and wrote some ASCII games for it in the programming mode. What do you need to know about it?

matt_rah December 26 2007, 06:40:10 UTC

How do I get it to divide by n-1 instead of by n when finding the standard deviation?

Matt

instigator_ash December 27 2007, 20:33:26 UTC

That I don't know, as I've never used the stats function.

jweb42 December 25 2007, 15:14:06 UTC

Yay! Glad the snow is awesome, that's great.

Are you skiing Big Sky or Moonlight? Dad mentioned that Moonlight has private ski instructors now and that you might work with someone there.

matt_rah December 26 2007, 06:41:22 UTC

Well, as my post about the "ski access" alludes to, we did Big Sky today, but the other two days so far have been Moonlight, and we're probably not going to do Big Sky again this vacation. I did have a lesson with the guy at Moonlight on Monday and it was really awesome.

Hey, when is your Spring Break? What are you planning on doing for it?

Matt

crystalpyramid December 25 2007, 15:46:02 UTC

What're you trying to do on the TI-83?

matt_rah December 26 2007, 06:41:34 UTC

How do I get it to divide by n-1 instead of by n when finding the standard deviation?

Matt

crystalpyramid December 26 2007, 15:12:29 UTC

My sister Eliza, who took AP Stats last year, says:

When you do 1-variable statistics on a data set, it gives you two versions of the standard deviation, Sx and σx. Sx is divided by n-1, σx is divided by n.

matt_rah December 27 2007, 00:58:49 UTC

Thank you!

Matt

labyrinth_ghoul December 25 2007, 20:13:13 UTC

I have Ti-83...and the manual I got my my high school

IF I can help, I will ^^

matt_rah December 26 2007, 06:41:41 UTC

How do I get it to divide by n-1 instead of by n when finding the standard deviation?

Matt

labyrinth_ghoul December 26 2007, 17:41:22 UTC

http://answers.yahoo.com/question/index?qid=20071213110641AAyjTqb

That is succinct answer. you need to use Sigma_x.

Also this one has a nice button by button walkthrough.
http://faculty.mdc.edu/csanchez/Courses/Statistics%20and%20the%20TI-83/Lesson%203%20-%20Ungroup%20data/LESSON%203%20%20%20%201-Variable%20Statist%20ungrouped%20data.doc

On a sidenote when you come to Providence next I can endeavor to get my TI-83 manual to you if you could make use of it. Sadly it sits in my closet now.

matt_rah December 27 2007, 00:59:27 UTC

I'll be in town for ProCon, though likely not before then, and would love to have a manual. I've had my own TI-83 for so long that I have no idea where the manual is.

Matt