# Introduction to Biostatistics: Screening

#### Learning Objectives

- Students should be able to define validity and reliability.
- Students should be able to define and calculate sensitivity, specificity.
- Students should be able to define positive predictive value, and negative predictive value.
- Students should be able to use Bayes theorem and 2 x 2 table methods to calculate positive predictive value, and negative predictive value.
- Students should be able to define and calculate likelihood ratio positive, and likelihood ratio negative
- Students should be able to use decision trees to evaluate diagnostic procedures
- Students should be abel to define threshold model