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.