11.3 - Test Yourself!
11.3 - Test Yourself!Think about it!
Select the answer you think is correct - then click the right arrow to proceed to the next question.
Question 1
Compared to a large sample size, a small sample size is more likely to lead to:
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The answer is: A result that is not significant. Small samples have more variability so a result that is not significant is more likely to occur.
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Correct. Small samples have more variability so a result that is not significant is more likely to occur.
- The sample size won’t matter if the sample mean is the same.
The answer is: A result that is not significant. Small samples have more variability so a result that is not significant is more likely to occur.
Question 2
With a very small treatment effect, the treatment is more likely to be declared significantly effective with:
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The answer is: A large sample size. When there is a small effect, large samples are more likely to detect it since the sample values will have less variability (making a significant result more likely to occur).
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Correct. When there is a small effect, large samples are more likely to detect it since the sample values will have less variability (making a significant result more likely to occur).
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The answer is: A large sample size. When there is a small effect, large samples are more likely to detect it since the sample values will have less variability (making a significant result more likely to occur).
Question 3
With more significance tests:
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Correct. For example, if you conduct 100 significance tests than you’d expect 5 to end up with p-values smaller than 0.05 when the null hypothesis is true.
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The answer is: You are more likely to get at least one significant result. For example, if you conduct 100 significance tests than you’d expect 5 to end up with p-values smaller than 0.05 when the null hypothesis is true.
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The answer is: A result that is not significant. Small samples have more variability so a result that is not significant is more likely to occur.
Question 4
True or False: A type 2 error is more likely to occur with a small sample size.
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Correct. Because of the greater variability you would not be able to rule out random chance as an explanation.
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The answer is: True. Because of the greater variability you would not be able to rule out random chance as an explanation.
Question 5
True or False: In an experiment where the subjects volunteered, there is no requirement to get any further consent.
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The answer is: False. For example, subjects must also be made aware of the nature of the experiment and the potential benefits and risks to them.
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Correct. For example, subjects must also be made aware of the nature of the experiment and the potential benefits and risks to them.