Secondary data are often __________,that is,the information is collected at two or more points in time.

A) cross-sectional
B) longitudinal
C) univariate
D) multivariate

Longitudinal

Pertains to research or studies that collect data from the same subjects repeatedly over a period of time to observe changes and developments.

Cross-sectional

A type of study or analysis that examines a population, or a representative subset, at a specific point in time.

Univariate

Pertaining to an analysis or statistical evaluation that involves only one variable.