Recent content by flying_young

What are some of the elementary remedial procedures to multicollinearity (VIF >= 10) in linear regression? We were told to simply just drop that particular independent variable, but someone else suggested we could center the predictor variables (ie., xi = Xi - Xbar). Can somebody explain why...

This is very well-elaborated. Thank you greatly.

Yes, it really depends on the statistical test you are interested in using. If you wish to test whether the probability of getting a head or a tail is equal (i.e., P(H)=P(T)=0.25 for two coins), then you may want to use the Chi-square goodness of fit test. The degree of freedom for this test...

Thanks StatDad, this is immensely helpful. So what exactly do you do when there is one or more influential outlier that is not due to human error? Can you name ,or perhaps explain, a robust regression method? Thank you kindly!

Hi Spock, a good statistics book I would recommend is "Mathematical Statistics with Applications" by Mendenhall and Scheaffer. It's a wonderful book because it touches on most of the concepts that I had to learn later on. It is definitely a starter's book and I still refer to it from time to...

Hi, you may think of the Poisson distribution being used to describe the number of changes (i.e., radioactive particles that enter a particular region) for a fixed interval of time. From what I have learned, it is sometimes more simplistic to describe a process with Poisson distribution than...

I know very much to treat X2 as a constant, but if NoMoreExams hasn't written out his steps, I wouldn't have figured out where I have gone wrong in the midst of calculations. I do understand from your stance that simply giving out the answer would do one no good. Perhaps in the future, I will...

Thank you, NoMoreExams! I finally figured out what I did wrong - a silly integration mistake! Thanks again! You have been an immense help.

Dear all, Sorry for the silly integration question. I haven't done calculus in ages and my memory has got really rusty! ='( The integral question is as follows: \int\ (X_1-\frac{X_2}{2})^2(\frac{1}{X_2}) dX_1 Sorry, I could not figure out how to insert the limits on my intergral. It is...