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:

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.

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:

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).

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).

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:

Correct. For example, if you conduct 100 significance tests than you’d expect 5 to end up with pvalues smaller than 0.05 when the null hypothesis is true.

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 pvalues smaller than 0.05 when the null hypothesis is true.

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.

Correct. Because of the greater variability you would not be able to rule out random chance as an explanation.

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.

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.

Correct. For example, subjects must also be made aware of the nature of the experiment and the potential benefits and risks to them.