NASA NTRS · 19800000284
An approximation to student's t-distribution
Abstract
Three equations relate Student's t-distribution to standard normal distribution with maximum error of less than 0.8 percent. First equation, used for degrees of freedom (v) greater than 2, expresses t variable in terms of standard normal variable z. For v=1 and 2, second and third equations express t exactly in terms of probability P.
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Rummler, D. R., Stoud, C. W.. 1980-09-01. An approximation to student's t-distribution. https://ntrs.nasa.gov/citations/19800000284
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