Bonus: Use vour calculator and create a 95% confidence interval for this same data Notice that zero is no longer in the CI. Explain why this is true (1.741a, sa, a59) The t becemesmaller, which causes less to be Svbtracted. This also happens because the Ilowes confidence interval, the more -precise the interval is. In fact, there IS a difference between the amount of money spent on books at BU and at UMASS Amherst. What error was committed when you ran your test? o What two things could you change about this problem to detect the difference?

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
icon
Concept explainers
Question
The attachment that starts with C has the main question, which I’ve answered, then the second pic has the 2 questions I’m having a problem with. The two that start with “in fact there is a difference” and “what two things could you change”.
45.04
27 33 72
6.72, 60.7a)
trage, between $6.7a less and $60.7a more the
UMASS Amherst students.
Ronus: Use your calculator and create a 95% confidence interval for this same data
Notice that zero is no longer in the CI. Explain why this is true.
(1.741a, sa. a59)
The t becemesmaller, which causes less to be Subtracted. This also happens because the Ilower the
confidence interval, the more -precise the interval is.
In fact, there IS a difference between the amount of money spent on books at BU and at
UMASS Amherst. What error was committed when you ran your test?
o What two things could you change about this problem to detect the difference?
What are the implications of making these changes?
Calculator Steps/TI Tips:
Transcribed Image Text:45.04 27 33 72 6.72, 60.7a) trage, between $6.7a less and $60.7a more the UMASS Amherst students. Ronus: Use your calculator and create a 95% confidence interval for this same data Notice that zero is no longer in the CI. Explain why this is true. (1.741a, sa. a59) The t becemesmaller, which causes less to be Subtracted. This also happens because the Ilower the confidence interval, the more -precise the interval is. In fact, there IS a difference between the amount of money spent on books at BU and at UMASS Amherst. What error was committed when you ran your test? o What two things could you change about this problem to detect the difference? What are the implications of making these changes? Calculator Steps/TI Tips:
rokTMately symmetric and unimodal
Independent Groups Assumption: The two
of each other.
must be independent
g roups we're
comparing
C. Example: A recent survey of 28 students at Boston University indicates that the students
spent (on average) $394/year on text books with a standard deviation of $57. At UMASS
Amherst, however, a survey of 35 found that students spent (on average) $367/year with a
standard deviation of $38. B= Boston University
U= UMASS Amherst
ng 28
nu= 35
Xe= $394/year
Ku$367/ year
S $38
Xョ- ヌ=$a9+-$367= $a7
Transcribed Image Text:rokTMately symmetric and unimodal Independent Groups Assumption: The two of each other. must be independent g roups we're comparing C. Example: A recent survey of 28 students at Boston University indicates that the students spent (on average) $394/year on text books with a standard deviation of $57. At UMASS Amherst, however, a survey of 35 found that students spent (on average) $367/year with a standard deviation of $38. B= Boston University U= UMASS Amherst ng 28 nu= 35 Xe= $394/year Ku$367/ year S $38 Xョ- ヌ=$a9+-$367= $a7
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Points, Lines and Planes
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
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