STA 2014 Week 10 Individual Work Solution Correct Answers
Week 10 individual work answers for a statistics course.
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STA 2014 Week 10 Individual Work Solution Correct Answers
Statistics
STA 2014
Week 10 Individual Work
Assignment Instructions
To complete this assignment:
1. Answer all of the questions below in the space provided.
2. Reflect on the information presented in this week’s lesson and provide an insightful response to
each question.
Save and Submit to Dropbox
1. Save your work as a Microsoft Word 2010 (.docx) file that includes your name, course code, and
title in the file name. For example: JaneSmith_STA2014_Week10.docx.
2. To submit your assignment, go to the Dropbox and click "Submit Assignment."
3. Click on the drop-down menu to select the Week 10: Individual Work basket in the Dropbox.
Objective: Use confidence intervals appropriately.
Section 9.1
22. You Explain It! Superstition: A USA Today/Gallup poll asked 1,006 adult Americans how much
it would bother them to stay in a room on the 13th floor of a hotel. Interestingly, 13% said it would
bother them. The margin of error was 3 percentage points with 95% confidence. Which of the
following represents a reasonable interpretation of the survey results? For those not reasonable,
explain the flaw.
(a) We are 95% confident that the proportion of adult Americans who would be bothered to stay in
a room on the 13th floor is between 0.10 and 0.16.
Answer:
(b) We are between 92% and 98% confident that 13% of adult Americans would be bothered to
stay in a room on the 13th floor.
Answer:
(c) In 95% of samples of adult Americans, the proportion who would be bothered to stay in a room
on the 13th floor is between 0.10 and 0.16.
Answer:
(d) We are 95% confident that 13% of adult Americans would be bothered to stay in a room on the
13th floor.
Answer:
Section 9.2
8. (a) Find the t-value such that the area in the right tail is 0.02 with 19 degrees of freedom.
Answer:
(b) Find the t-value such that the area in the right tail is 0.10 with 32 degrees of freedom.
Answer:
(c) Find the t-value such that the area left of the t-value is 0.05 with 6 degrees of freedom. [Hint:
Use symmetry.]
Answer:
Statistics
STA 2014
Week 10 Individual Work
Assignment Instructions
To complete this assignment:
1. Answer all of the questions below in the space provided.
2. Reflect on the information presented in this week’s lesson and provide an insightful response to
each question.
Save and Submit to Dropbox
1. Save your work as a Microsoft Word 2010 (.docx) file that includes your name, course code, and
title in the file name. For example: JaneSmith_STA2014_Week10.docx.
2. To submit your assignment, go to the Dropbox and click "Submit Assignment."
3. Click on the drop-down menu to select the Week 10: Individual Work basket in the Dropbox.
Objective: Use confidence intervals appropriately.
Section 9.1
22. You Explain It! Superstition: A USA Today/Gallup poll asked 1,006 adult Americans how much
it would bother them to stay in a room on the 13th floor of a hotel. Interestingly, 13% said it would
bother them. The margin of error was 3 percentage points with 95% confidence. Which of the
following represents a reasonable interpretation of the survey results? For those not reasonable,
explain the flaw.
(a) We are 95% confident that the proportion of adult Americans who would be bothered to stay in
a room on the 13th floor is between 0.10 and 0.16.
Answer:
(b) We are between 92% and 98% confident that 13% of adult Americans would be bothered to
stay in a room on the 13th floor.
Answer:
(c) In 95% of samples of adult Americans, the proportion who would be bothered to stay in a room
on the 13th floor is between 0.10 and 0.16.
Answer:
(d) We are 95% confident that 13% of adult Americans would be bothered to stay in a room on the
13th floor.
Answer:
Section 9.2
8. (a) Find the t-value such that the area in the right tail is 0.02 with 19 degrees of freedom.
Answer:
(b) Find the t-value such that the area in the right tail is 0.10 with 32 degrees of freedom.
Answer:
(c) Find the t-value such that the area left of the t-value is 0.05 with 6 degrees of freedom. [Hint:
Use symmetry.]
Answer:
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Document Details
University
University of Central Florida
Subject
Statistics