I have a statistics test tonight

[tomasmk2]

Uhhh...back to you, Al.

I hear ya!

[Smackie Chan]

<BLOCKQUOTE><font size=2 face="Verdana, Helvetica, sans-serif">quote:</font><table border="0" width="90%" bgcolor="#333333" cellspacing="1" cellpadding="0"><tr><td width="100%"><table border="0" width="100%" cellspacing="0" cellpadding="2" bgcolor="#FF9900"><tr><td width="100%" bgcolor="#DDDDDD"><font size=2 face="Verdana, Helvetica, sans-serif">Originally posted by tomasmk2:
Uhhh...back to you, Al.

I hear ya!</font></td></tr></table></td></tr></table></BLOCKQUOTE>

Hey, you know I'm just jerkin' your chain. After all, I can't POSSIBLY think I'm better than y'all, since I have no ego. Just ask index.

[tomasmk2]

i know, i'm just in really good mood tonight.

[Roger_the_Shrubber]

Stats? Cool.

Would you mind explaining to pp that the max sample number of any n to get the +/- 3% is 1500?

I thank you.

[mothomus]

how's about a poisson distribution of tard trolls relative the mean

[Adept]

<BLOCKQUOTE><font size=2 face="Verdana, Helvetica, sans-serif">quote:</font><table border="0" width="90%" bgcolor="#333333" cellspacing="1" cellpadding="0"><tr><td width="100%"><table border="0" width="100%" cellspacing="0" cellpadding="2" bgcolor="#FF9900"><tr><td width="100%" bgcolor="#DDDDDD"><font size=2 face="Verdana, Helvetica, sans-serif">Originally posted by Smackie Chan:
Finding probabilities using the normal distribution, using the central limit theorem, approximating a binomial distribution using the normal distribution, computing confidence intervals, finding z and t scores, computing minimum sample sizes...that kinda stuff.</font></td></tr></table></td></tr></table></BLOCKQUOTE>

Fun shit. Is that all with one right hand side variable?

I gather that it would have to be or you would be more concerned with F-statistics than t values.

[Dr Bob]

OK, Smackie, at what sample size would you feel confident invoking the Central Limit Theorem?


And, Adept, simply having more than than one explanatory variable doesn't necessarily mean you run to the shelter of the F-stat V the t-stat, it is inherently a function of the hypothesis you are in the process of testing.


For example, I may want to understand the impact of taxation of GNP, but I have to include other right hand side variables to avoid excluded variable bias....but my focus will be on the coefficient and t-stat for my taxation variable, where I won't care as much about an F-stat or the R-squared and shit.


Edit: AND, the F and t-tests would basically converge with only one right hand side variable....(F is actually t squared with one RHS)...

<font color="#330033" size="1">[ March 21, 2002 11:51 AM: Message edited by: Dr Bob ]</font>

[Smackie Chan]

<BLOCKQUOTE><font size=2 face="Verdana, Helvetica, sans-serif">quote:</font><table border="0" width="90%" bgcolor="#333333" cellspacing="1" cellpadding="0"><tr><td width="100%"><table border="0" width="100%" cellspacing="0" cellpadding="2" bgcolor="#FF9900"><tr><td width="100%" bgcolor="#DDDDDD"><font size=2 face="Verdana, Helvetica, sans-serif">Originally posted by Roger_the_Shrubber:
Stats? Cool.

Would you mind explaining to pp that the max sample number of any n to get the +/- 3% is 1500?</font></td></tr></table></td></tr></table></BLOCKQUOTE>

I think you mean the minimum sample required to achieve a confidence level that is within +/- 3%, since there is no maximum (the larger the sample, the nearer you approach the actual proportion). You need to provide more information, however, such as the confidence level in which you're interested (typically 90%, 95%, or 99%) and the standard deviation, since the minimum sample (n) = [(the proper z score x the standard deviation)/the margin of error]squared. The z score is determined by the confidence level, so until you provide the needed data, I can't show pp a damn thing!

[Adept]

Smackie - whats the test on?

[Smackie Chan]

<BLOCKQUOTE><font size=2 face="Verdana, Helvetica, sans-serif">quote:</font><table border="0" width="90%" bgcolor="#333333" cellspacing="1" cellpadding="0"><tr><td width="100%"><table border="0" width="100%" cellspacing="0" cellpadding="2" bgcolor="#FF9900"><tr><td width="100%" bgcolor="#DDDDDD"><font size=2 face="Verdana, Helvetica, sans-serif">Originally posted by Adept:

Smackie - whats the test on?</font></td></tr></table></td></tr></table></BLOCKQUOTE>

Finding probabilities using the normal distribution, using the central limit theorem, approximating a binomial distribution using the normal distribution, computing confidence intervals, finding z and t scores, computing minimum sample sizes...that kinda stuff.