Math 113: Chapters 7-8 Study Guide

Test Distribution Notes
Mean(s) Z or T Use Z if sigma is known
Use T if sigma is unknown

Two samples with Dependent case creates a new variable for which you then find the sample standard deviation, so use T.

Proportion(s) Z np >= 5, nq >= 5
Variance Chi-Square
Variance(s) F Put the larger variance on top will make it be a right tail test.