The entire group of individuals or instances about whom we hope to learn.

The list from which the sample is selected

A sample that consists of the entire population

Values used to describe a population such as mean and standard deviation

Values used to describe a sample such as mean and standard deviaton

Bias introduced to a sample when individuals can choose to participate in the sample. Always invalid. ex. online surveys

Occurs when an individual cannot be reached who is selected for a sample

Occurs when a group of the population is left out of the process of choosing a sample

When the respondent or the interviewer cause some of the questions to be leading or dishonest