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Dear Hartley Thanks for the reply. The study was a type of opinion survey trying to identify the causes of why health care professionals do not want stay in...
Akib, Your topic is extremely important; I’m glad that people are working on it. This problem of a lack of rural doctors & nurses affects a large number of...
Hello friends I am having hard time to find error in my SAS mixed model. Here is my problem. I am looking the effect of three variables on soybean yield. I...
Dear all statisticians_group member. Can any body help me to show how to derive the variance of Ordinary Least Squares (OLS) estimator? y=a+bx+e I have seen...
Hi all,  Wish to know SAS Training institutes in chennai Specifically for Clinical Domain, would be more helpful if any one of you suggest the best training...
A Riadi, I advise you to consult a standard textbook on this topic. These variances are almost always presented in introductory statistics texts. ... From: A....
Thank you for your advice. I have read from this link: http://connection.cwru.edu/econ326/mod4/A/Computing%20Variance%20of%20Simple%20OLS%20Estimator.doc It...
A Riadi, for some reason the link you provided is not opening for me. However, if you express the model in matrix form, as y=x*beta + epsilon, where the...
hello everyone, im new to the group. just thought i'd say hello and ask for some help with a stats problem. im studying bees and am trying to find if there is...
David, if you obtain a p-value, what would it tell you about your proposed null hypothesis (H) of absolutely no correlation between distance D & relatedness R?...
thanks for your your advice andrew, though im not sure how i would go about permuting all the possible combinations of 10 nests without some sort of computer...
David, Yes I hope someone in the group has worked with your type of spatial correlation data. True, you would need computer software to permute even an...
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i had read out almost all the books of statistics but i am still dont clear about degrees of freedom.is there any body who can answer so simply that could be...
 Dear Hasan,  You need a number of data points or values in order to estimate a parameter (e.g. the mean). The degrees of freedom is the minimum number of...
Hi everybody, This is my question. I have two set of data: set A (from A1 to A8) and set B (also from B1 to B8). Each value of both sets are calculated as...
Edoardo, I assume you want a confidence interval for the mean of the population which is generating Dataset C? One approach would be to calculate the...
Generally to calculate Confidence Interval for ratio data, we calculate it using Fieller's theorem. I think same will be applicable in your case as well. Â ...
Let me try! Â Suppose you have 4 variables, say, x1, x2, x3, x4. Now you know their sum i.e. x1+x2+x3+x4=n, where n is some known number. Â Now here you can...
 In this case you need to do Chi-square correction. try this site: http://www.people.ku.edu/~preacher/chisq/chisq.htm Best regards, Dr. Ghada Ahmed Abu...
Dear Friends I was working on one of our data related to anatomical measurements of the nerve size & area in the eye... Our sample size is 450 subjects,...
are your subjects all the same sex? if not then this might be causing the non-normality. nerve size might be normally distributed in males and females...
Hi Ramesh, The problem you stated regarding normality test by KS test is genuine and this is true for other normality tests as well. The moral is we should not...
Ramesh & Madan, 1. testing normality: no distribution is absolutely normal; normality is merely an idealization that makes life mathematically convenient for...
Hi all, I wanted to let you know about our training seminar on predictive analytics - coming May, Oct, and Nov in NYC, Stockholm, DC and other cities. This is...
