Dason (03-09-2014)
Dason (03-09-2014)
I never knew that
The mathematical explanation of a statistical procedure is really just pseudo-code, which we can make operational by translating it into real computer code. --B. Klemens
Miner, what do you mean by "shotgun pattern"? I have no idea what kind of pattern this refers to.
In God we trust. All others must bring data.
~W. Edwards Deming
white noise
The mathematical explanation of a statistical procedure is really just pseudo-code, which we can make operational by translating it into real computer code. --B. Klemens
Dason, Work on the stock a little. That one went right over my head.
Just a roughly circular spread of random data sets with no discernible pattern. Just like you would get from discharging a shotgun against a target.
I generated this graph by creating two independent sets of 30 data points from the standard normal distribution then graphing them.
I think the key is not if it is a shotgun pattern, but if there is a pattern at all I think Dason's data did have a pattern, which suggests to me a paired t-test.
"Very few theories have been abandoned because they were found to be invalid on the basis of empirical evidence...." Spanos, 1995
lol I missed that entirely.
"Very few theories have been abandoned because they were found to be invalid on the basis of empirical evidence...." Spanos, 1995
The easiest approach is to look at the correlation between the Disorder and Control groups....if you have a correlation of, say, 0.20 or greater than use the paired samples t-test.
Note that the two Independent Samples T-test implies that there is no correlation between the two groups. (Independence implies zero correlation).
It can be easily shown that the two-independent samples T-test (with equal sample sizes) is just a special case of the Paired samples T-test (I.e., setting the correlation to zero in the denominator).
I agree with Greta!
"victor is the reviewer from hell" -Jake
"victor is a machine! a publication machine!" -Vinux
GretaGarbo (03-10-2014)
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