for each given situation, determine if the method of randomization is either appropriate or not…

for each given situation, determine if the method of randomization is either appropriate or not appropriate.\nnot appropriate appropriate\nsituation randomization\n1. 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.\n2. 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.\n3. 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.

for each given situation, determine if the method of randomization is either appropriate or not appropriate.\nnot appropriate appropriate\nsituation randomization\n1. 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.\n2. 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.\n3. 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.

Answer

Brief Explanations:

  1. People leaving a movie - theater may not be a representative sample of all drivers in the city. There could be biases related to movie - goers' demographics, time of day, etc. So, this randomization is not appropriate.
  2. Flipping a fair coin to assign people to experimental or control groups is a standard and appropriate way of randomization in an experiment to test the health effects of a sweetener. It helps in creating comparable groups.
  3. Randomly assigning subjects to groups based on a random drawing is an appropriate way to randomize a study about the long - term effects of chicken pox on the immune system. It helps in reducing selection bias.

Answer:

  1. Not Appropriate
  2. Appropriate
  3. Appropriate