The study of a population, a process or a relationship of interest begins with collecting relevant data from representative samples. A good understanding of the key terms will help us design appropriate statistical analysis of the collected data.

Learning Objectives:

1. Distinguish the terms – population, parameter, sample, statistics, and other key terms.
2. Distinguish between different types of statistical studies – observational, experimental, retrospective or prospective
3. Learn about different levels of measurement, data types, and variables
4. Learn about different ways of collecting data – Sampling Methods and Experiments
5. Identify sources of measurement bias and variability