Consider ratings of 4 “Agree” or 5 “Strongly Agree” to mean that test takers have obtained a “high” score on a BRS item. Ratings of 1-3 would be considered “low” item scores. Compute the item discrimination index (d) for BRS Item 3. Enter the values below that you obtain from Excel: Total # of test takers N = _______ 25% of the total # of test takers, or # in the Upper 25% group U = _______ # of test takers in the Upper 25% group for BRS total scores who scored high on item 3 = _______ # of test takers in the Lower 25% group for BRS total scores who scored high on item 3 = _______ Item discrimination index
Consider ratings of 4 “Agree” or 5 “Strongly Agree” to mean that test takers have obtained a “high” score on a BRS item. Ratings of 1-3 would be considered “low” item scores. Compute the item discrimination index (d) for BRS Item 3. Enter the values below that you obtain from Excel: Total # of test takers N = _______ 25% of the total # of test takers, or # in the Upper 25% group U = _______ # of test takers in the Upper 25% group for BRS total scores who scored high on item 3 = _______ # of test takers in the Lower 25% group for BRS total scores who scored high on item 3 = _______ Item discrimination index
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
- Consider ratings of 4 “Agree” or 5 “Strongly Agree” to mean that test takers have obtained a “high” score on a BRS item. Ratings of 1-3 would be considered “low” item scores. Compute the item discrimination index (d) for BRS Item 3. Enter the values below that you obtain from Excel:
Total # of test takers N = _______
25% of the total # of test takers, or # in the Upper 25% group U = _______
# of test takers in the Upper 25% group for BRS total scores who scored high on item 3 = _______
# of test takers in the Lower 25% group for BRS total scores who scored high on item 3 = _______
Item discrimination index d = ________
| ID # | Item 1 | Item 2 | Item 3 | Item 4 | Item 5 | Item 6 | BRS Total Score |
| 1 | 1 | 3 | 2 | 3 | 3 | 3 | 2.5 |
| 2 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 3 | 5 | 4 | 4 | 4 | 2 | 3 | 3.666667 |
| 4 | 5 | 5 | 4 | 5 | 5 | 5 | 4.833333 |
| 5 | 4 | 5 | 4 | 4 | 5 | 5 | 4.5 |
| 6 | 4 | 3 | 3 | 2 | 4 | 4 | 3.333333 |
| 7 | 3 | 5 | 5 | 5 | 5 | 5 | 4.666667 |
| 8 | 3 | 4 | 3 | 3 | 3 | 3 | 3.166667 |
| 9 | 5 | 5 | 4 | 5 | 5 | 5 | 4.833333 |
| 10 | 5 | 5 | 4 | 4 | 4 | 4 | 4.333333 |
| 11 | 5 | 3 | 3 | 5 | 3 | 4 | 3.833333 |
| 12 | 4 | 4 | 1 | 4 | 4 | 2 | 3.166667 |
| 13 | 2 | 4 | 3 | 5 | 4 | 5 | 3.833333 |
| 14 | 2 | 1 | 2 | 2 | 2 | 3 | 2 |
| 15 | 4 | 3 | 3 | 1 | 3 | 5 | 3.166667 |
| 16 | 5 | 4 | 5 | 5 | 4 | 3 | 4.333333 |
| 17 | 1 | 2 | 2 | 4 | 5 | 2 | 2.666667 |
| 18 | 4 | 5 | 5 | 4 | 4 | 4 | 4.333333 |
| 19 | 4 | 5 | 4 | 1 | 4 | 4 | 3.666667 |
| 20 | 5 | 5 | 4 | 3 | 3 | 4 | 4 |
| 21 | 5 | 4 | 5 | 3 | 5 | 5 | 4.5 |
| 22 | 5 | 5 | 4 | 3 | 3 | 4 | 4 |
| 23 | 5 | 3 | 3 | 5 | 5 | 2 | 3.833333 |
| 24 | 5 | 5 | 2 | 4 | 5 | 5 | 4.333333 |
| 25 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 3 steps with 2 images
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman