Recent content by johnjackson

  1. J

    P-Values for less than t test two sample differ by .002 when applying 1-[two-tailed-p-value] on a ti-83

    TI83 - p-values for less than t test two sample differ by .002 when applying 1-[two-tailed-p-value] So I thought that a less than p value is equal to 1-[two-tailed-p-value] but on a TI83, I see that this is not the case. The reason I need to know is I am trying to make my own calculator using...
  2. J

    Using Apache Commons T Distribution cumulative probability to find p given DF and t Value

    Great! Thanks! Here are the edits public double getPLessThan(double DF, double tValue) { return new TDistribution(DF).cumulativeProbability(tValue); } public double getPMoreThan(double DF, double tValue) { return 1 - new...
  3. J

    Using Apache Commons T Distribution cumulative probability to find p given DF and t Value

    [org.apache.commons.math3.distribution.TDistribution] Hello, I am writing a program for statistics and am don't have a very in depth knowledge of p value; I understand what it is so maybe it is that I don't understand cumulative probability and how it gets me a T Value. I've only taken...