what is the defination of pooling data for statistical analysis?
152342
Pooling data is taking data from separate but similar studies to broaded the amount of data available for analysis.
365087
You can expect mind numblingly boring calculations for most of your summer.  The mathematics behind statistics is fairly elementary, it's the staying awake and alert part that's difficult...\nGood Luck, I had to take Statistics in college, and I have to say... It was the best one hour nap 3 times a week a person could possibly ask for...
929935
variations matter greatly in interpreting data.  Something might seem like it is returning significantly different results than the control but stat evaluation may show that the variations are minimal at best
317476
You would look for a company that does data analysis or data mining. http://metricconsultants.com/ usually it would be some sort of consulting type of firm such as this one.
830991
I'm wondering why you created the data 1-3500?  I would think you would use the set of data available and figure the standard deviation and average.  With that information, you would be able to predict tomorrows value at a certain confidence level.  I forget is that the p test or the t test.  its been a while since I took statistics.
320722
The central limit theorem still applies.\n\nWhen variables are correlated a principal component analysis will find the independent variables for which the CLT applies.
618506
Yes there are basically the same thing. Data mining is a field where it draws from many other established academic areas. And the result is confusion of different terms having the same meaning.\n\nIMHO, Classification sounds like statistics and machine learning; Discrimination sounds like from SVM literature. Any difference, if any, it is most likely not important, just like whats the difference between tuples, records, examples, rows, instances, items? Its all geek-speak :)
181649
what statistical informations can be extracted from difference between actual and estimate data?and how?
458174
Actually, statistics books are notorious for being written in such a way that no normal human can understand them. The trick, generally, is trying to find a way to relate the problems to something you're interested in. For example, if you like basketball: one possible sampling distribution would be the number of free throws individual players make over a season. You could take a sample of, say, 10 of the players and find the mean and standard deviation. You could compute a 95% confidence interval with that information, which would allow you to say that you're 95% confident that the average number of free throws made by NBA players in a season will be between this number and that number. You could find the probability that a given player would make at least a certain number of free throws in a season by finding the z-score and looking it up on the normal probability distribution table, etc. If you're really struggling with the terminology, I recommend visiting your math help center on campus (most of them have one), or contacting a tutor.
972008
This is obviously a statistics problem.  Treat each mother as a sample and the data entry the age at which they had their first child.  If all you need is the "mean" point, it is a simple matter of knowing what a "normal distribution" is.  Half of the mothers will be above the mean date and half below (both 50%).  In a "formula" it would be (total of all the ages divided by the number of mothers)  More useful for the analyst is the shape of the distribution - the bell curve and the amount of data in the "tails".  To do this you need to perform a "t test" of the data set.  Since I assume that what you mean is the whole population of women, the distribution can be assumed to be "normal" and the "degrees of freedom" is infinite.  Look up "t test" in your statistics book, also known as "student's t".  The answer is there, in the "degrees of freedom" expressed in "standard deviations" from the mean.  Thus you can talk about "confidence intervals" from this.  The Wikipedia article is surprisingly hopeless for the non-mathematician.  My education is statistics came from "Biostatistical Analysis" by Zar, still in print and one of the only books from my former life I still keep on my shelf.
571247
i wish i could help you...it looks like you need a stats book...i was tryin to find this website i used to use in my stats class...but of course when you are lookin for somethin u cant find it...sorry about that
808395
You can't apply statistics (to anything) unless you have a sufficient number of values to work with.  For example, if you took a poll of who people were going to vote for, if you only asked 5 people, you might not get an accurate representation - but if you ask 5000 then the margin of error gets smaller.  With molecules, there are millions of them.
17841
You might try DAP. You can find it here along with a lot of other free statistical software.\nhttp://members.aol.com/johnp71/javasta2.html
677914
Aren't we all random collections of data?
956188
What you're looking for is the standard deviation.  If the data values are X and the mean is XBAR, then\n\nS.D. = sqrt{[SUM(X - XBAR)^2] / n}\n\nn is the number of data items, and SUM means to add up the squares of the differences between the data values and the mean.\n\nThe lower the standard deviation, the more tightly packed the data.  If the data is normally distributed, about 68% of the data will lie within one standard deviation of the mean, and 95% will be within two standard deviations.\n\n[Edit:  In light of the previous answers, I should add that the standard deviation is the square root of the variance.]
359986
Student's t-test can be used to determines the probability that 2 random variables have the same mean. This can then be used to test whether two sets of data come from the same source.
1098306
http://en.wikipedia.org/wiki/Econometrics\nPlease click the above link to know in detail.