The following statement best describes the sample used in which type of descriptive design? "we will use a carefully selected sample, selection being based on household size, income level, and television viewing patterns. we must also be concerned with the stability of the sample, in order to ensure repeated availability for measurement over time."

Longitudinal design                              

Explanation:

Longitudinal design: Also referred to as a panel study or longitudinal survey. It is described as a research design that includes the observations of the same variables repeatedly for either long or short periods on time. The variable used in the research, for example, can be different individuals. Fundamentally, the longitudinal research design collects information or data about an individual or a group of individuals.

Types:

1. Panel study.

2. Cohort study.

The following statement best describes the sample used in the longitudinal type of descriptive design.

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