Or

Tutorial

These examples show how to use the TI calculator functions to construct confidence intervals and perform hypothesis tests for proportions and for means in two populations.

2-PropZInt

Use a normal distribution to compute a confidence interval estimate for the difference in proportions between two groups.

2-PropZTest

Use a normal distribution to test a hypothesis about a difference in proportions between two groups.

2-SampTInt

Use sample data from two independent samples to construct a confidence interval estimate of the difference between two population means.

2-SampTTest

Use sample data from two independent samples to test a hypothesis about the difference between two population means.