You have studied the idea of random sampling as a fundamental principle by which to gather information about a population. Since then you have discovered formal techniques of statistical inference which enable you to draw conclusions about a population based on analysis of a sample. With this topic you will begin to study another technique of data collection for use when the goal is not to describe a population but to investigate the effects that a variable has on other variables. You will investigate the need for controlled experiments and discover some fundamental principles which govern the design and implementation of such experiments.
KeywordsDeath Penalty Foreign Language Homicide Rate Coaching Program Intense Experience
Unable to display preview. Download preview PDF.