<p>What is a P value? I was reading my Barron’s AP psychology study guide, and the section was tlaking about Inferential Statistics. The kept on mentioning a P value without really mentioning what it is.</p>
<p>The P value is in statistical hypothesis testing, the p-value is the probability of obtaining a result at least as “impressive” as that obtained, assuming the truth of the null hypothesis that the finding was the result of chance alone. The fact that p-values are based on this assumption is crucial to their correct interpretation.</p>
<p>More technically, the p-value of an observed value observed of some random variable T used as a test statistic is the probability that, given that the null hypothesis is true, T will assume a value as or more unfavorable to the null hypothesis as the observed value tobserved. “More unfavorable to the null hypothesis” can in some cases mean greater than, in some cases less than, and in some cases further away from a specified center.</p>
<p>oh…i was just wondering…did you say something ??? ?</p>