Power Function Neagtive Intercept

2000-07-25 Thread Dr. N.S. Gandhi Prasad
Hello I have fitted a power function Y = a (X1^b1)*(x2^b2)*(X3^b3) by transfroming Y as well as Xs in to LOGs and followed least Squares procedure. However, the estimate of 'a' is found to be negative. Can we accept the results? What meaning can be attached to 'a'. Here Y is output and

Re: extrapolation

2000-07-25 Thread Herman Rubin
In article 397cfc9a$[EMAIL PROTECTED], Veeral Patel [EMAIL PROTECTED] wrote: Hi, I have a set of data (25000 samples), i have plotted a histogram , the historgram is skewed to the right and the closest distribution i can match the data to is either gamma or weibull distribution. I would like to

Re: Power Function Neagtive Intercept

2000-07-25 Thread Rich Ulrich
On 25 Jul 2000 05:24:23 -0700, [EMAIL PROTECTED] (Dr. N.S. Gandhi Prasad) wrote: Hello I have fitted a power function Y = a (X1^b1)*(x2^b2)*(X3^b3) by transfroming Y as well as Xs in to LOGs and followed least Squares procedure. However, the estimate of 'a' is found to be negative.

Re: contrasts for Kruskal Wallis

2000-07-25 Thread Glen Barnett
Richard M. Barton [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Suppose I have 4 groups, and want to compare means. I do a one-way ANOVA using Bonferroni (my choice) contrasts to get at pairwise differences. Suppose I decide that I have non-normality

Re: S

2000-07-25 Thread Frank E Harrell Jr
This is a multi-part message in MIME format. --0C764C6C183968088D96D7FA Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Chad Scherrer wrote: I have some questions about S and S-Plus, but I want to be sure I'm posting to the right group. Does anybody