[STA 2381] - Final Exam Guide - Comprehensive Notes for the exam (23 pages long!)

• School: Baylor University
• Department: Statistical Sciences
• Course: STA 2381
• Professor: Jillian Cornell

Document Summary

Descriptive statistics consists of methods for organizing and summarizing information. Inferential statistics consists of methods for drawing and measuring the reliability of conclusions about a population based on information obtained from a sample of the population: descriptive statistics, can be applied to populations and to samples. Inferential statistics: can only be performed on samples. Conclusions from the sample are inferred to the population. In an observational study, researchers simply observe characteristics and take measurements. In a designed experiment, researchers impose treatments and controls and then observe characteristics and take measurements: observational studies can reveal association. Strata: in stratified random sampling, the strata should be sampled proportional to their size. A factor is a variable whose effect on the response variable is of interest in the experiment. The possible values of a factor are the levels. The treatment is each experimental condition: in a designed experiment, the individuals or items on which the experiment is performed are called experimental unit.