## Search found 1398 matches

- Sat Dec 19, 2009 5:32 pm UTC
- Forum: Mathematics
- Topic: Let's have fun with Statistics!
- Replies:
**9** - Views:
**1666**

### Re: Let's have fun with Statistics!

Anywho, MGFs are pretty interesting theoretically and they can definitely help you out. Like Velifer said one of the easiest ways to prove the CLT (albeit it's a weaker form of the CLT because you need to assume that the MGF exists) is with MGFs. I think the proofs I've seen use the characteristic ...

- Fri Dec 18, 2009 11:43 pm UTC
- Forum: Mathematics
- Topic: Let's have fun with Statistics!
- Replies:
**9** - Views:
**1666**

### Re: Let's have fun with Statistics!

... You have me quoted here but that was actually bprime you were quoting. Anywho, MGFs are pretty interesting theoretically and they can definitely help you out. Like Velifer said one of the easiest ways to prove the CLT (albeit it's a weaker form of the CLT because you need to assume that the MGF...

- Fri Dec 18, 2009 5:29 am UTC
- Forum: Mathematics
- Topic: Let's have fun with Statistics!
- Replies:
**9** - Views:
**1666**

### Re: Let's have fun with Statistics!

That's quite a bit of material a pretty broad. What is it about Moment Generating Functions that you don't quite get? I'm assuming you could compute the moment generating function for a specified random variable? Is it why we care about MGFs that is tripping you up? How we use MGFs to calculate mome...

- Thu Dec 17, 2009 3:13 pm UTC
- Forum: Mathematics
- Topic: Calculus Applications Book
- Replies:
**9** - Views:
**1568**

### Re: Calculus Applications Book

*I remember really struggling for 3 hours with trig substitution because the book was doing all kinds of crazy shit in its example without explaining why Cause it works duh! Haha, I know exactly what you mean though. When I was first learning trig substitution it just seemed totally arbitrary but y...

- Thu Dec 17, 2009 3:07 pm UTC
- Forum: General
- Topic: Who the dickens are you?
- Replies:
**10922** - Views:
**2347481**

### Re: INTRO THREAD THE THIRD

Monika wrote:BTW, did you copy and paste or how did you end up misspelling paranoid the same way twice?

I know it wasn't my post but ... Knot evirybady iz gud at teh spelleng ok? God knows it's not what I'm best at. I rely on spell check too much me thinks.

- Wed Dec 16, 2009 7:13 pm UTC
- Forum: Books
- Topic: What are you readioactive now(and other book related stuff)?
- Replies:
**1821** - Views:
**471571**

### Re: What are you readioactive now(and other book related stuff)?

LuNatic wrote:I just finished Enders Game by Orson Scott Card. Interesting read.

How long did it take you finish? I know a couple of people who claim the only way to read it is in one sitting. I don't have the time to read almost any book in one sitting so I've never accomplished this feat.

- Wed Dec 16, 2009 4:47 am UTC
- Forum: Mathematics
- Topic: Implicit Differentation Problem
- Replies:
**4** - Views:
**772**

### Re: Implicit Differentation Problem

Esquilax wrote:I see no errors, although your final result might look nicer if you subbed in [imath]\sqrt{x+y^2}[/imath] with [imath]5x^2[/imath] using the original equation.

That's a good point. While not necessary it does make the final result look nicer.

- Wed Dec 16, 2009 4:03 am UTC
- Forum: Music
- Topic: What do you play?
- Replies:
**274** - Views:
**36131**

### Re: What do you play?

I've been playing guitar for about 9 years now. I mostly just write my own music and play as a stress reliever though and I'm not too worried about sounding all that great. I taught myself a little bit of piano and I really enjoy playing but don't have ready access to one.

- Wed Dec 16, 2009 3:58 am UTC
- Forum: Mathematics
- Topic: Implicit Differentation Problem
- Replies:
**4** - Views:
**772**

### Re: Implicit Differentation Problem

I don't see any problems with it either.

- Tue Dec 15, 2009 1:02 pm UTC
- Forum: Mathematics
- Topic: Help with tough system of equations and factoring problem?
- Replies:
**7** - Views:
**1217**

### Re: Help with tough system of equations and factoring problem?

but I'm assuming that because the coefficients order: 1 5 10 10 5 1, it means the equation is equal to (x + y) 5 Yeah, I dunno, you get to recognize them pretty easily after a while. It couldn't hurt to read the wikipedia page on pascal's triangle http://en.wikipedia.org/wiki/Pascal%27s_triangle

- Mon Dec 14, 2009 8:34 pm UTC
- Forum: Mathematics
- Topic: Help with tough system of equations and factoring problem?
- Replies:
**7** - Views:
**1217**

### Re: Help with tough system of equations and factoring problem?

after adding/subtracting the equations, I'm at the step where: 3 = x 5 + y 5 + 5x 4 y + 5xy 4 + 10x 3 y 2 + 10x 2 y 3 1 = x 5 - y 5 + 5xy 4 - 5x 4 y + 10x 3 y 2 - 10x 2 y 3 I know this is going to end up equal to: 3 = (x + y) 5 1 = (x - y) 5 BUT, how do you factor it out to that step? any help woul...

- Sat Dec 12, 2009 5:43 pm UTC
- Forum: Mathematics
- Topic: Introduction + A few simple questions
- Replies:
**15** - Views:
**1782**

### Re: Introduction + a few simple questions

I'm familiar with (u'v-uv')/v^2 . Then you have the data from which to see their form. You use (u'v-uv')/v^2 , and they use u'/v - uv'/v^2 . These are simple transformations of each other. (Don't see it? Multiply each of them by v^2 .) You aren't multiplying ...

- Sat Dec 12, 2009 2:06 am UTC
- Forum: General
- Topic: Who the dickens are you?
- Replies:
**10922** - Views:
**2347481**

### Re: INTRO THREAD THE THIRD

dawg1232 wrote:Has anyone really been far as decided to use even go want to do look more like?

Yes.

- Sat Dec 12, 2009 2:02 am UTC
- Forum: Mathematics
- Topic: 2 dice vs. 1 die
- Replies:
**12** - Views:
**1867**

### Re: 2 dice vs. 1 die

It's equivalent if you roll the first d10 to get the first digit (0-9), then roll the second d10 to get the second digit (0-9). (00 corresponds to 100). Then the probability of getting a particular two-digit number is (1/10)*(1/10) = 1/100, the same as with the d100. This is how I interpreted it an...

- Fri Dec 11, 2009 6:14 pm UTC
- Forum: Mathematics
- Topic: Introduction + A few simple questions
- Replies:
**15** - Views:
**1782**

### Re: Introduction + Simple question [Solved]

Finally, the question I had was how do I factorize y^(7) - y^(3)? I can get it to y^(3)(y^(4) - 1), but wolfram claims I can make it look like (y-1) y^(3) (y+1) (y^(2)+1). A nice little thing to recognize in a situation like this... You had it down to a y^3*(y^4-1) and wanted to get to y^3*...

- Fri Dec 11, 2009 5:57 pm UTC
- Forum: Forum Games
- Topic: Corrupt-a-wish
- Replies:
**26069** - Views:
**2436459**

### Re: Corrupt-a-wish

Jedifreak wrote:I wish I could tell exactly what stocks to buy to get rich, and the funds to buy them.

Granted. You can easily tell exactly which stocks to buy and you can identify the necessary funds to buy them. But you'll never attain said funds.

I wish the next poster has a wonderful day.

- Fri Dec 11, 2009 1:35 am UTC
- Forum: Mathematics
- Topic: So, what can I do to keep myself entertained and interested?
- Replies:
**14** - Views:
**1942**

### Re: So, what can I do to keep myself entertained and interested?

Gemoetry (Done)-Intro into Trig (Sin Cos and Tan), area of shapes, etc... Not very interesting to me. Maybe it's because it was a basic geometry class? I've learned it's a bad idea to judge a class based on the beginner-level one. I would agree. Don't judge geometry based on the intro level geometr...

- Thu Dec 10, 2009 4:13 am UTC
- Forum: Forum Games
- Topic: Corrupt-a-wish
- Replies:
**26069** - Views:
**2436459**

### Re: Corrupt-a-wish

Granted. But it's a First Act electric with it's electronics removed.

I wish for a Jones Cream Soda.

I wish for a Jones Cream Soda.

- Thu Dec 10, 2009 3:58 am UTC
- Forum: Religious Wars
- Topic: Is Java is a bad language for beginners?
- Replies:
**234** - Views:
**132649**

### Re: Is Java is a bad language for beginners?

My progression went something like: TI-83 TI-84 Silver (Slight difference but I enjoyed the ability to keep track of time) SAS R Java X-Lisp Stat (just enough to write a few stat related functions) Python Java was the first one I studied in depth though and I didn't have any real problems with it. A...

- Wed Dec 09, 2009 11:57 pm UTC
- Forum: Mathematics
- Topic: Why is standard deviation the root mean square? (merged)
- Replies:
**17** - Views:
**10945**

### Re: Standard deviation is awful

So I tried making sense of it, and eventually came up with a seemingly much better formula (called the mean deviation, which I didn't know at the time) which seemed to play the same role, and make sense doing it (I found this because I realized that you only need to take the absolute value, not the...

- Wed Dec 09, 2009 5:09 am UTC
- Forum: Gaming
- Topic: Games you can't remember the title of.
- Replies:
**1934** - Views:
**548437**

### Re: Games you can't remember the title of.

LuNatic wrote:Edit: I found it, it's called Hover!

Edit2: Microsoft have made it available for download off their public FTP server.

I played this game! Oh man. I might have to give that another try.

- Wed Dec 09, 2009 4:49 am UTC
- Forum: The Help Desk
- Topic: Recommend me an Antivirus
- Replies:
**18** - Views:
**1627**

### Re: Recommend me an Antivirus

headprogrammingczar wrote:Don't forget Symantec, same shit, different name.

I loathe Symantec.

- Wed Dec 09, 2009 4:33 am UTC
- Forum: Mathematics
- Topic: Stats project
- Replies:
**13** - Views:
**1086**

### Re: Stats project

Is there any sort of data quality analysis done for this project?

- Tue Dec 08, 2009 7:42 pm UTC
- Forum: Mathematics
- Topic: Either I'm crazy or 1 is infinitely close to 0
- Replies:
**18** - Views:
**4332**

### Re: Either I'm crazy or 1 is infinitely close to 0

The key is that you can't say THIS Lets start with a definition 1=.999... this is mathematical fact. .999... And THIS Well the introduction of multiplication makes this very interesting because .9(.999...) isn't quite .9 it is infinitely close to .9 but .9 it is not. and be consistent. This is exac...

- Tue Dec 08, 2009 7:30 pm UTC
- Forum: General
- Topic: Who the dickens are you?
- Replies:
**10922** - Views:
**2347481**

### Re: INTRO THREAD THE THIRD

Snow is overrated. I have no idea what people see in it. It is cold and death. ...can you tell I'm anxious about the snow for my three-week trip to Boston? Good point actually, but it's just for fun since I've never seen snow before :P Though, I really hate bathing in cold weathers. I've lived in t...

- Tue Dec 08, 2009 5:33 am UTC
- Forum: Mathematics
- Topic: Pure/Applied/Stats
- Replies:
**8** - Views:
**2640**

### Re: Pure/Applied/Stats

If you get into stat theory you can forget the calculator. If you get into higher level stats you're going to need a computer because you do NOT want to do those calculations by hand lemme tell you...

- Tue Dec 08, 2009 3:07 am UTC
- Forum: Individual XKCD Comic Threads
- Topic: 0672: "Suggestions"
- Replies:
**90** - Views:
**22274**

### Re: "Suggestions" Discussion

I decided about a year or two ago (3?) to quit facebook. I had my account deactivated but they make it very very hard for you to get RID of your account completely. They just wont DELETE you without a longer process. Then about 4 months ago I got an email that I had reactivated my account. Apparent...

- Mon Dec 07, 2009 6:49 pm UTC
- Forum: General
- Topic: Who the dickens are you?
- Replies:
**10922** - Views:
**2347481**

### Re: INTRO THREAD THE THIRD

Hiya,

I'm Dason. I've lurked the forum for quite a while and just recently started posting. I'm a 1st year ph.d student in statistics at Iowa State University. I'm writing this post to procrastinate grading a 6 inch pile of labs.

I'm Dason. I've lurked the forum for quite a while and just recently started posting. I'm a 1st year ph.d student in statistics at Iowa State University. I'm writing this post to procrastinate grading a 6 inch pile of labs.

- Sun Dec 06, 2009 7:55 am UTC
- Forum: Individual XKCD Comic Threads
- Topic: 0667: "SkiFree"
- Replies:
**160** - Views:
**46801**

### Re: "SkiFree" Discussion

They should make a skifree movie. Lord knows they've made scripts out of less. Look on in horror. If that horrifies you, then don't click here . Speaking of Super Mario Bros. Did anybody ever watch the godawful Super Mario Bros. Super Show!? I hadn't seen it until I got netflix and instant streamed...

- Fri Dec 04, 2009 7:45 am UTC
- Forum: Mathematics
- Topic: How many digits of Pi do you know?
- Replies:
**445** - Views:
**106261**

### Re: How to memorize pi?

I haven't memorized as many digits as some of the peoples I know but when I tried memorizing it I didn't just group into groups of 3 but rather I did a group of 3, group of 3, group of 4. It's more like a phone number then and I found it pretty natural to memorize a group of ten in such a matter xxx...

- Thu Dec 03, 2009 6:19 am UTC
- Forum: Individual XKCD Comic Threads
- Topic: 0667: "SkiFree"
- Replies:
**160** - Views:
**46801**

- Thu Dec 03, 2009 5:22 am UTC
- Forum: Coding
- Topic: Awesome Acheivements
- Replies:
**116** - Views:
**12750**

### Re: Awesome Acheivements

In my second programming class we had a project where we had to make a game where cats were chasing mice around a maze. This took some work in itself but I added a feature that randomly (about 1/50 of the time) a raptor would randomly appear in the maze at the start and everything would die (of cour...

- Thu Dec 03, 2009 4:44 am UTC
- Forum: Religious Wars
- Topic: Linux or Windows or Mac OS? Mac or PC? An Interested Convert
- Replies:
**43** - Views:
**16375**

### Re: Linux or Windows or Mac OS? Mac or PC? An Interested Convert

I definitely am much more of a Gnome fan than KDE. Gnome just feels... cleaner.

- Thu Dec 03, 2009 4:39 am UTC
- Forum: Mathematics
- Topic: Im looking for suggestions for textbooks.
- Replies:
**6** - Views:
**940**

### Re: Im looking for suggestions for textbooks.

In my undergraduate abstract class I used Joe Gallian's book "Contemporary Abstract Algebra". I enjoyed it and thought he did a good job of explaining everything pretty well. It's the only book I've ever encountered so I can't really compare it to anything else but I can say that I did thi...

- Wed Dec 02, 2009 8:00 pm UTC
- Forum: Books
- Topic: What are you readioactive now(and other book related stuff)?
- Replies:
**1821** - Views:
**471571**

### Re: What are you readioactive now(and other book related stuff)?

Moving on - Alice in Wonderland is the next book on my schedule. I recently reread that. My first read through was when I was younger and I just found it so much more fascinating now then I ever remember finding it as a child. I recently heard somebody talking about The Giver so I picked up a copy ...

- Wed Dec 02, 2009 7:53 pm UTC
- Forum: Forum Games
- Topic: Count to a Million
- Replies:
**94029** - Views:
**7336182**

### Re: Count to a Million

21984

Shouldn't we at least be counting in binary or something exciting?

Shouldn't we at least be counting in binary or something exciting?

- Wed Dec 02, 2009 7:41 am UTC
- Forum: Religious Wars
- Topic: Linux or Windows or Mac OS? Mac or PC? An Interested Convert
- Replies:
**43** - Views:
**16375**

### Re: Linux or Windows or Mac OS? Mac or PC? An Interested Convert

Ubuntu is much faster on my machine than XP, boots 30 seconds faster (or more.. I don't know.) It feels faster, runs smoother. Out of the box, I have smart CPU scaling, making for improved battery life, my wifi card works wonderfully (switched to wicd because it's much nicer), and I can get anythin...

- Wed Dec 02, 2009 7:18 am UTC
- Forum: Music
- Topic: Most interesting performance you've seen?
- Replies:
**6** - Views:
**1502**

### Re: Most interesting performance you've seen?

I'd have to agree that TSO puts on an amazing show. It might not have been the most "interesting" show I've seen but it was definitely the most elaborate and musically one of the best. They are very good at what they do and keep you entertained for the entire time. I saw HelloGoodbye play ...