EWMA Vs Linear Average, Chi Square Test, & False Positives.

2001-10-31 Thread Vinay A. Mahadik
Hi, I have a basic question that I just couldn't find an answer for. I want to measure the % error introduced by using EWMA as against a linear average for a *stationary* random process (not necessarily Normal) over a given (long/short term) time window: I am using the Chi Squared test for ano

Re: ranging opines about the range

2001-10-31 Thread Rich Ulrich
[ I have rearranged Zar's note.] After this one, > >>> Harold W Kerster <[EMAIL PROTECTED]> 10/29/01 04:31PM >>> > If you define the range as max - min, you get zero, not one. What > definition are you using. On 29 Oct 2001 16:11:15 -0800, [EMAIL PROTECTED] (Jerrold Zar) wrote: > I was r

Re: EDA

2001-10-31 Thread Robert Ehrlich
Data mining , by and large, seems to use fairly conventional multivatiate stats tools along with a bunch of clustering procedures. In addtion there is a lot of use of neural nets (mostly as a lazy man's tool or a last resort, but occasionally sensibly). Data prep. (including transformations) seem

Probability --How do I find the conditional distribution?

2001-10-31 Thread jenny
If we have X and Y 's density function, each with independent distribution, how do I get 1) the conditional distribution of X, given than X>a.(a >0 and is a fixed number) 2) the conditional distribution of X, given that X <= Y. Thanks. jenny ===

Re: Comparing percent correct to correct by chance

2001-10-31 Thread Donald Burrill
On Wed, 31 Oct 2001, Glen Barnett wrote, in response to my comment: > > On Sun, 28 Oct 2001, Melady Preece wrote: > > MP> Hi. I want to compare the percentage of correct identifications (taste MP> test) to the percentage that would be correct by chance 50%? (only two MP> items being tasted). C