A customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service has been completed. The department then matches each customer's rating with the number of minutes the person waited on hold. The accompanying table shows the ratings and number of minutes on hold for 10 randomly selected customers. Minutes Rating 4 16 8 12 1 17 6 10 7 13 1 17 10 15 3 19 7 15 3 13 R2=0.274 α=0.05 The F-test statistic is 3.02. The p-value is 0.121 Because the p-value is greater than α, do not reject the null hypothesis. There is not enough evidence to conclude that the coefficient of determination is significant. c. Construct a 95% confidence interval for the average rating given by a customer who waits 8 minutes. UCL = 15.88 (Round to two decimal places as needed.) LCL = 10.74 (Round to two decimal places as needed.) d. Construct a 95% prediction interval for the rating given by a customer who waits 8 minutes. UPL = (Round to two decimal places as needed.) LPL = (Round to two decimal places as needed.)
A customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service has been completed. The department then matches each customer's rating with the number of minutes the person waited on hold. The accompanying table shows the ratings and number of minutes on hold for 10 randomly selected customers. Minutes Rating 4 16 8 12 1 17 6 10 7 13 1 17 10 15 3 19 7 15 3 13 R2=0.274 α=0.05 The F-test statistic is 3.02. The p-value is 0.121 Because the p-value is greater than α, do not reject the null hypothesis. There is not enough evidence to conclude that the coefficient of determination is significant. c. Construct a 95% confidence interval for the average rating given by a customer who waits 8 minutes. UCL = 15.88 (Round to two decimal places as needed.) LCL = 10.74 (Round to two decimal places as needed.) d. Construct a 95% prediction interval for the rating given by a customer who waits 8 minutes. UPL = (Round to two decimal places as needed.) LPL = (Round to two decimal places as needed.)
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter7: Integration
Section7.CR: Chapter 7 Review
Problem 88CR
Related questions
Question
A customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service has been completed. The department then matches each customer's rating with the number of minutes the person waited on hold. The accompanying table shows the ratings and number of minutes on hold for 10 randomly selected customers.
|
Minutes
|
Rating
|
|
|---|---|---|
|
4
|
16
|
|
|
8
|
12
|
|
|
1
|
17
|
|
|
6
|
10
|
|
|
7
|
13
|
|
|
1
|
17
|
|
|
10
|
15
|
|
|
3
|
19
|
|
|
7
|
15
|
|
|
3
|
13
|
R2=0.274
α=0.05
The F-test statistic is 3.02.
The p-value is 0.121
Because the p-value is greater than α, do not reject the null hypothesis. There is not enough evidence to conclude that the coefficient of determination is significant.
c. Construct a 95% confidence interval for the average rating given by a customer who waits 8 minutes.
|
UCL
|
=
|
15.88
(Round to two decimal places as needed.) |
|
LCL
|
=
|
10.74
(Round to two decimal places as needed.) |
d. Construct a 95% prediction interval for the rating given by a customer who waits 8 minutes.
|
UPL
|
=
|
|
|
LPL
|
=
|
|
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
Follow-up Questions
Read through expert solutions to related follow-up questions below.
Follow-up Question
In regards to "Go to Stat > Regression > Regression > Fit a regression model." where is stat?
Solution
by Bartleby ExpertKnowledge Booster
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.Recommended textbooks for you
Calculus For The Life Sciences
Calculus
ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Algebra
ISBN:
9781680331141
Author:
HOUGHTON MIFFLIN HARCOURT
Publisher:
Houghton Mifflin Harcourt
Calculus For The Life Sciences
Calculus
ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Algebra
ISBN:
9781680331141
Author:
HOUGHTON MIFFLIN HARCOURT
Publisher:
Houghton Mifflin Harcourt
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning
Holt Mcdougal Larson Pre-algebra: Student Edition…
Algebra
ISBN:
9780547587776
Author:
HOLT MCDOUGAL
Publisher:
HOLT MCDOUGAL