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Statistical theory and methodology. Mathematical statistics. Parametric inference. Nonparametric inference.enSun, 29 Mar 2015 00:30:08 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Statistical Research
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single function of two gaussian distributed variables..
http://www.talkstats.com/showthread.php/60195-single-function-of-two-gaussian-distributed-variables..?goto=newpost
Sat, 28 Mar 2015 17:48:48 GMTHi Folks,
I have a two 2 dimenstional gaussian function of variables x and y and of their respective standard deviations. I have single valued...Hi Folks,

I have a two 2 dimenstional gaussian function of variables x and y and of their respective standard deviations. I have single valued function d(x, y) and I want to know the probability density function of this d(x,y)

Trying to understand how I would proceed to calculate this ?

Cheers,
Farzad
]]>Statistical ResearchFarzadhttp://www.talkstats.com/showthread.php/60195-single-function-of-two-gaussian-distributed-variables..What statistical test do I use to tell if my data statistically significant?
http://www.talkstats.com/showthread.php/60187-What-statistical-test-do-I-use-to-tell-if-my-data-statistically-significant?goto=newpost
Sat, 28 Mar 2015 01:12:25 GMTThis is for a PhD experiment I am working on. I have 5 types of rock samples. I am trying to understand how their ability to preserve a type of...This is for a PhD experiment I am working on. I have 5 types of rock samples. I am trying to understand how their ability to preserve a type of fossils differs and whether the difference is statistically significant. I determined the presence or absence of the fossil (using a spectroscopy tool) in 9 spots of a defined area in one of the rocks and calculated the percentage of positive fossil occurrences. I then repeated the measurement 10 times in different areas for each category of rock samples. I then obtained a mean percentage of positive occurrences for each category. What test do I use to understand (1) if and (2) how the means of the 5 categories are statistically different from each other? Can I then rank the categories in their preservation potential to contain fossils? Is repeating the test 10 times per category enough?

Thanks!
]]>Statistical Researchgalaxzhttp://www.talkstats.com/showthread.php/60187-What-statistical-test-do-I-use-to-tell-if-my-data-statistically-significantInteresting abstract question - Statisticians pls chk this
http://www.talkstats.com/showthread.php/60185-Interesting-abstract-question-Statisticians-pls-chk-this?goto=newpost
Fri, 27 Mar 2015 19:06:22 GMTI have a massive dataset (10s of millions of rows and 100s of dimensions). The dimensions are of all conceivable data types.
How do I arrive at...I have a massive dataset (10s of millions of rows and 100s of dimensions). The dimensions are of all conceivable data types.

How do I arrive at the sample that is:

1) Smallest

2) Most representative of the population with respect to all the dimensions

If you can direct me to any scholarly article on this subject, would be grateful!
]]>Statistical Researchcheckharishhttp://www.talkstats.com/showthread.php/60185-Interesting-abstract-question-Statisticians-pls-chk-this