Prospective and Retrospective Studies

Differentiate between prospective and retrospective studies.

Which of these situations best describes aretrospectiveobservational study?

• a.)A company using different promotions and analyzing its sales.
• b.)A clinical researcher giving a medicine to a person and analyzing its effects.
• c.)A student flipping a coin and analyzing its outcomes.
• d.)A doctor analyzing the medical history of a person.