EXST 2201 Chapter : Unit 1 General Concepts
Document Summary
Objective 1. 1: define statistics, explain the process of statistics, distinguish b/w qualitative and quantitative variables, distinguish b/w discrete and continuous variables, and determine the level of measurement of a variable. Objective 1. 2: distinguish b/w an observational study and an experiment, explain the various types of observation studies. Objective 1. 6: describe the characteristics of an experiment, explain the steps in designing an experiment, explain the completely randomized design, and explain the matched-pairs design. Statistics is the science of data: three types: sampling, descriptive statistics, inferential statistics. Descriptive statistics is a technique used to condense and describe data (sample) Inferential statistics is a technique used to systematically draw conclusions about a population from a set of sample data (population) Statistical methods are combinations of the descriptive and infererntial techniques. Sampling are techniques used to collect information: four sampling techniques: simple random sampling, stratified sampling, systematic sampling, and cluster sampling, sampling can be done with replacement or without replacement (usually without)
