Population 5 Minutes, 54 Seconds [ Choose ] [Choose ] any systematic discrepancy between a sample and the corresponding population Sample a sample where individual units (e.g. people) are tracked through time A sample in which every member of the population is equally likely to be included. The set of all possible cases that might have been included in a data set. the type of entity you choose to focus on in a data analysis Census A file or separate list that provides all the necessary information to interpret each variable in a data set A specific selection of cases from the population. A tabular representation of a data set in which the rows correspond to cases and the columns to variables. A sample that comprises all cases in the population. Data frame a sample of multiple units, collected at a single point in time Code book [ Choose ] Random sample [ Choose ] Unit of analysis [ Choose ] sampling bias [ Choose ] longitudinal sample [ Choose ] cross-sectional sample [ Choose ]