For each given situation, determine if the method of randomization is either appropriate or not appropriate.
A university wants to test the health effects of a certain
sweetener. Prior to testing the sweetener, they
randomize the experiment by flipping a fair coin that
assigns each person to the experimental or control group.
A laboratory wants to know how having chicken pox as a
child has affected people's immune systems as adults.
They randomize the study by assigning subjects to groups
based on a random drawing
A car company is performing a survey to find out about
people's driving habits in a certain city. They randomize
the survey by talking to every 50th person who leaves a
movie theater within this certain city.