Welch's t-test: Difference between revisions
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integrate and simpson are from the [[Numerical_integration#J|Numerical integration]] task. |
integrate and simpson are from the [[Numerical_integration#J|Numerical integration]] task. |
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lngamma is from http://www.jsoftware.com/pipermail/programming/2015-July/042174.html |
lngamma is from http://www.jsoftware.com/pipermail/programming/2015-July/042174.html -- for values less than some convenient threshold (we use 1, but we could use a modestly higher threshold), we calculate it directly. For larger values we compute the fractional part directly and rebuild the log of the factorial using the sum of the logs. |
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mean is classic J - most J tutorials will include this |
mean is classic J - most J tutorials will include this |
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