Donnie Wants to Know Whether Attractive Waiters Make More Tips

question 167

Multiple Choice

Donnie wants to know whether attractive waiters make more tips.He has a group of people rate the attractiveness of five different waiters,and he gets the waiters to tell him how much money they make in tips every night for a month.What type of research design has Donnie used

• A) quasi-experimental design 
• B) correlational design 
• C) experimental design 
• D) case study design

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Definitions:

Antibodies

Proteins produced by the immune system to identify and neutralize foreign substances like bacteria and viruses.

Antigens

Substances that the immune system recognizes as foreign, triggering an immune response; often parts of pathogens like bacteria, viruses, or fungi.

Toxins

Poisonous substances produced by living cells or organisms that can cause disease when introduced into the body tissues.

Complement System

A part of the immune system that enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism.