Chapter 1. How to Experiment Badly

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Stat Tutor
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Question 1

2:07

Question 1.1

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Incorrect. Answer C includes a placebo or fake treatment with a control group. Plus, the subjects are randomly assigned to the two groups. Both of these will "fix" the original study. Additionally, taking some type of measurement that is not self-reporting will improve the study.
Correct. Answer C includes a placebo or fake treatment with a control group. Plus, the subjects are randomly assigned to the two groups. Both of these will "fix" the original study. Additionally, taking some type of measurement that is not self-reporting will improve the study.
Incorrect. Try again.
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Questions 2-3

3:11

Question 1.2

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Incorrect. The best fix would be to create a study that includes a placebo or fake treatment with a control group. Here, the subjects are randomly assigned to the two groups. Additionally, taking some type of measurement that is not self-reporting will improve the study.
Correct. The best fix would be to create a study that includes a placebo or fake treatment with a control group. Here, the subjects are randomly assigned to the two groups. Additionally, taking some type of measurement that is not self-reporting will improve the study.
Incorrect. Try again.
2

Question 1.3

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Incorrect. Without randomization, studies cannot yield valid inferences.
Correct. Without randomization, studies cannot yield valid inferences.
Incorrect. Try again.
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