Quiz: The Null Hypothesis And You
Due Sep 7 at 11:59pm
Points 30
Questions 10
Time Limit 45 Minutes
Allowed Attempts Unlimited
This quiz is no longer available as the course has been concluded.
Attempt History
Attempt Time Score
KEPT Attempt 5 30 minutes 30 out of 30
LATEST Attempt 5 30 minutes 30 out of 30
Attempt 4 16 minutes 27 out of 30
Attempt 3 11 minutes 21 out of 30
Attempt 2 13 minutes 27 out of 30
Attempt 1 13 minutes 27 out of 30
Score for this attempt: 30 out of 30
Submitted Aug 19 at 2:22pm
This attempt took 30 minutes.
Correct answer
Question 1
3 / 3 pts
Statistical power is NOT dependent upon the:
population mean
sample size
effect size
nominal alpha level
Correct answer
Question 2
3 / 3 pts
When should researchers reject the null hypothesis?
if the probability of obtaining the results by chance is lower than the nominal alpha level if the
values seem different to an expert
if the test statistic is less than 5
if the population mean and the sample mean are not the same
Correct answer
Question 3
3 / 3 pts
If the nominal alpha is set to .05, what p value would be considered statistically significant?
.022
.22
2.2
22
Correct answer
Question 4
3 / 3 pts
If the nominal alpha is set to .05, what p value would not be considered statistically significant?
.222
.022
.034
.033
Correct answer
Question 5
3 / 3 pts
With good sampling practices, what percentage of possible values for the sample mean will lead to a
Type I Error with the standard alpha level?
5%
.5%
50%
1%
Correct answer
Question 6
3 / 3 pts
If nominal alpha is set to .01, which of these p values would be considered criteria for rejecting the null
hypothesis?
.009
.02
.04
.042
Correct answer
Question 7
3 / 3 pts
When researchers test a null hypothesis, they are looking for:
disconfirmatory evidence
supportive data
a difference between individuals
misrepresentation in the sample
Correct answer
Question 8
3 / 3 pts
If the state of the world is that the null hypothesis should not be rejected and researchers fail to reject
it, they have committed:
no error
Type I error
Type II error
Type III error
Correct answer
Question 9
3 / 3 pts
Which of these is an acceptable interpretation of a non-significant outcome in research?
researchers should fail to reject the null hypothesis
the null hypothesis should be accepted
the null hypothesis should be rejected
results must be incorrect
Correct answer
Question 10
3 / 3 pts
In reality if the null hypothesis should be rejected and researchers fail to reject it, they have committed:
Type II error
no error
Type I error
neither Type I nor Type II error
Quiz Score: 30 out of 30
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