Over the past year, the vice president of human resources at a large medical center conducted a series of three-month workshops aimed at increasing worker motivation and performance. As a check of effectiveness, she selected 7 employees from the personnel files and recorded their most recent annual performance ratings along with the ratings attained prior to attending the workshops. At a 5% level of significance, is there evidence that the workshops increased performance ratings? Take the differences = before - after. Before After 59 72 72 74 89 62 67 74 81 78 88 92 71 81 Take the differences = before-after. Order the data smallest to largest, ignoring the negative signs. Rank the data from 1 to 7. Observation 5 had the values Before = 81 and After = 78. What is the difference before - after of these values? What rank will observation 5 receive? Add up all the ranks that have a negative difference, T_. What is the value of T_? [ Add up all the ranks that have a positive difference, T+. What is the value of T+? What is the test statistic, T? The minimum(T T+)?| From the Table of Critical Values for the Wilcoxon Matched Pairs Signed Rank Test, what is the critical value for the test? What can be concluded for the study? O Performance ratings significantly increased after the workshops. O Performance ratings significantly decreased after the workshops. in no tor the worlcohong

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Topic Video
Question
Over the past year, the vice president of human resources at a large medical center conducted a series of three-month workshops
aimed at increasing worker motivation and performance. As a check of effectiveness, she selected 7 employees from the personnel
files and recorded their most recent annual performance ratings along with the ratings attained prior to attending the workshops. At a
5% level of significance, is there evidence that the workshops increased performance ratings? Take the differences = before - after.
Before
After
59
72
72
74
89
62
67
74
81
78
88
92
71
81
Take the differences = before-after. Order the data smallest to largest, ignoring the negative signs. Rank the data from 1 to 7.
Observation 5 had the values Before = 81 and After = 78. What is the difference before - after of these values?
What rank will observation 5 receive?
Add up all the ranks that have a negative difference, T_. What is the value of T_? [
Add up all the ranks that have a positive difference, T+. What is the value of T+?
What is the test statistic, T? The minimum(T_T+)?|
From the Table of Critical Values for the Wilcoxon Matched Pairs Signed Rank Test, what is the critical value for the test?
What can be concluded for the study?
O Performance ratings significantly increased after the workshops.
O Performance ratings significantly decreased after the workshops.
O There is no significant increase in performance ratings after the workshops.
O There is a significant difference in performance ratings after the workshops.
Transcribed Image Text:Over the past year, the vice president of human resources at a large medical center conducted a series of three-month workshops aimed at increasing worker motivation and performance. As a check of effectiveness, she selected 7 employees from the personnel files and recorded their most recent annual performance ratings along with the ratings attained prior to attending the workshops. At a 5% level of significance, is there evidence that the workshops increased performance ratings? Take the differences = before - after. Before After 59 72 72 74 89 62 67 74 81 78 88 92 71 81 Take the differences = before-after. Order the data smallest to largest, ignoring the negative signs. Rank the data from 1 to 7. Observation 5 had the values Before = 81 and After = 78. What is the difference before - after of these values? What rank will observation 5 receive? Add up all the ranks that have a negative difference, T_. What is the value of T_? [ Add up all the ranks that have a positive difference, T+. What is the value of T+? What is the test statistic, T? The minimum(T_T+)?| From the Table of Critical Values for the Wilcoxon Matched Pairs Signed Rank Test, what is the critical value for the test? What can be concluded for the study? O Performance ratings significantly increased after the workshops. O Performance ratings significantly decreased after the workshops. O There is no significant increase in performance ratings after the workshops. O There is a significant difference in performance ratings after the workshops.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer
Knowledge Booster
Data Collection, Sampling Methods, and Bias
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
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 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…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
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
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman