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    I don't understand why they've divided sxx by a million?
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    I don't understand why they've divided sxx by a million?
    I'm sure I answered this one a couple of weeks ago

    It's because of the scaling - h = x/1000 so when you work out the squared differences or whatever you get a factor of (1/1000)^2 - check out your formula for Sxx etc
 
 
 
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Updated: May 15, 2013
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