Question

identify the type of observational study (cross - sectional, retrospective, or prospective) described below. a research company uses a device to record the viewing habits of about 12,500 households, and the data collected over the past 10 years will be used to determine whether the proportion of households tuned to a particular news program increased. which type of observational study is described in the problem statement? a cross - sectional study a retrospective study a prospective study

Explanation:

A retrospective study looks at past data. Here, the company uses data collected over the past 10 years, so it's a retrospective study. A cross - sectional study looks at data at a single point in time, and a prospective study looks forward in time (collects data as events happen in the future), which doesn't match here.

Answer:

A. A retrospective study