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Technology Stocks : Micron Only Forum

MU 246.84

+4.2%

Nov 14 9:30 AM EST

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To: jimbo who wrote (51092)	4/6/2000 8:00:00 PM
From: Land_Lubber	Read Replies (1) of 53903

Sorry, jimbo, I don't have a link. It is formed by taking the time and sales data between a certain time (t0) and the current time and calculating a linear regression line for it. This becomes the channel axis. Then go though the same data again and find the difference between the regression line and the T&S data. Take the square-root of the average of the square of all these differences. This is sigma, the standard deviation of the T&S data from the regression line. Now plot two lines parallel to the regression line, one above it and one below it, but each separated vertically from the channel axis by two times sigma (i.e., the total vertical width is 4 times sigma). If T&S data is randomly distributed (Gaussian) around the regression line (which of course it is not, but this is the theory) then 95% of the T&S data will be within the 2-sigma band. The "Central Limit Theorm" shows that non-Gaussian distributions can obey Gaussian statistics in the limit of many samples. This is basic Stats 101, you probably have an old college text in the basement with all this stuff in it. Land_Luber

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