Skip to main content
United States
Jump To
Support
Register or Log In
Support
Register or Log In
Instructors
Browse Products
Getting Started
Students
Browse Products
Getting Started
Return to Research Methods Using R 1e Student Resources
Chapter 15 Multiple choice questions
Quiz Content
*
not completed
.
Assuming a starting alpha level of 0.05, what is the alpha level if we Bonferroni correct for 18 tests?
0.00278
correct
incorrect
0.9
correct
incorrect
0.0556
correct
incorrect
0.00056
correct
incorrect
*
not completed
.
What does a p-value of 0.026 change to after Bonferroni correction for 4 comparisons?
0.0065
correct
incorrect
0.026
correct
incorrect
0.104
correct
incorrect
0.0013
correct
incorrect
*
not completed
.
How many of the following p-values remain significant after applying Holm-Bonferroni correction (assuming alpha = 0.05)?
0.03, 0.01, 0.9, 0.6, 0.002, 0.045
One
correct
incorrect
Two
correct
incorrect
Three
correct
incorrect
None are significant
correct
incorrect
*
not completed
.
Apply false discovery rate correction to the p-values from Question 3. How many remain significant?
One
correct
incorrect
Two
correct
incorrect
Three
correct
incorrect
None are significant
correct
incorrect
*
not completed
.
What is the familywise error rate for 8 comparisons with an alpha level of 0.01?
0.92
correct
incorrect
0.08
correct
incorrect
0.00125
correct
incorrect
0.077
correct
incorrect
*
not completed
.
Download the data file for the multiple-choice questions for Chapter 15
, and open it in
R.
The file contains a matrix called
timesignal
, which consists of data from 25 participants (rows) at 100 time points (columns). First conduct a t-test comparing to 0 at each time point. How many are significant?
10
correct
incorrect
31
correct
incorrect
37
correct
incorrect
49
correct
incorrect
*
not completed
.
Use the code on pages 235-6 to find all of the contiguously significant clusters, assuming a cluster forming threshold alpha of 0.05. How many clusters are there (before cluster correction)?
3
correct
incorrect
10
correct
incorrect
17
correct
incorrect
29
correct
incorrect
*
not completed
.
What is the summed t-value of the largest cluster?
18.79
correct
incorrect
17.41
correct
incorrect
9.01
correct
incorrect
4.39
correct
incorrect
*
not completed
.
Generate a null distribution based on resampling the largest cluster. Approximately, what are the upper and lower 95% confidence intervals of the distribution?
-2 to 2
correct
incorrect
-5 to 5
correct
incorrect
-10 to 10
correct
incorrect
-7 to 7
correct
incorrect
*
not completed
.
How many clusters remain significant following cluster correction?
1
correct
incorrect
3
correct
incorrect
7
correct
incorrect
9
correct
incorrect
Previous Question
Submit Quiz
Next Question
Reset
Exit Quiz
Review all Questions
Submit Quiz
Are you sure?
You have some unanswered questions. Do you really want to submit?
Back to top
Printed from , all rights reserved. © Oxford University Press, 2024
Select your Country