Reference Tables

Probability tables for the standard normal and \(t\) distributions. Each link opens a PDF that you can read on screen or print.

Table	What it gives you
Standard Normal Table — Negative Z-scores	Cumulative probability \(P(Z \leq z)\) for \(z\) from \(-3.9\) to \(0.0\)
Standard Normal Table — Positive Z-scores	Cumulative probability \(P(Z \leq z)\) for \(z\) from \(0.0\) to \(3.9\)
t-Distribution Table	Critical values \(t_p\) by degrees of freedom, with the matching two-sided confidence level for each column

The standard normal table is split across two sheets — use the one that matches the sign of your \(z\)-score.