TY - JOUR AU - Hughett, Paul PY - 2007/11/21 Y2 - 2024/03/28 TI - Accurate Computation of the F-to-z and t-to-z Transforms for Large Arguments JF - Journal of Statistical Software, Code Snippets JA - J. Stat. Soft. VL - 23 IS - 1 SE - Code Snippets DO - 10.18637/jss.v023.c01 UR - https://www.jstatsoft.org/index.php/jss/article/view/v023c01 SP - 1 - 5 AB - The obvious method for transforming an F or t variate into a z variate is via the corresponding p value, but this method is inaccurate when F or t is so large that p differs from 1 by only the last few bits of its floating-point representation. More accurate results may be obtained by using q = 1 - p as the intermediate variable so that the full precision of the floating-point representation is available. ER -