dat quiz 7 sb

pdf

School

International School of Business, UEH *

*We aren’t endorsed by this school

Course

T123

Subject

Statistics

Date

May 23, 2024

Type

pdf

Pages

Uploaded by CaptainHornet4267

3/12/23, 3:27 PM Wrap-Up Quiz 7: Statistics for Business-T123PWB-2 Wrap-Up Quiz 7 Due Mar 15 at 11:59pm Points 10 Questions 10 Time Limit 45 Minutes Attempt History LATEST Attempt Time Score Attempt 1 29 minutes 10 out of 10 Score for this quiz: 10 out of 10 Submitted Mar 12 at 3:26pm This attempt took 29 minutes. Correctl Question 1 1/1 pts A random sample of 15 ATM transactions at Eyre Square revealed a mean transaction time of 3.1 minutes with a standard deviation of 1.4 minutes. The width (in minutes) of the 98 percent confidence interval for the true mean transaction time is: +2.131 + 0.639 + 0.949 + 0.841 Question 2 1/1 pts https:/flearn.kfo.edu.vn/courses/206/quizzes/3110 1/5

3/12/23, 3:27 PM Wrap-Up Quiz 7: Statistics for Business-T123PWB-2 The Rising Sun Restaurant's owner wanted to know the average age of its customers. A random sample of 20 customers is taken. It shows a mean age of 43 years with a standard deviation of 4 years. The width of a 95 percent Cl for the true mean client age is approximately: + 1.753. years. + 2.093 years. + 1.960 years. Correctl + 1.872 years. Question 3 1/1 pts A random sample of 100 commercial customers of AT&T Mobiles revealed that 25 had paid their accounts within a month of billing. The 98 percent confidence interval for the true proportion of customers who pay within a month would be: 0.153 to 0.247 0.148 to 0.252 0.138 to 0.262 Correct! 0.149 to 0.351 Question 4 1/1 pts In a large lecture class, the professor announced that the scores on a recent exam were normally distributed with a range from 51 to 87. Using https:/learn.kfo.edu.vn/courses/206/quizzes/3110 2/5

3/12/23, 3:27 PM Wrap-Up Quiz 7: Statistics for Business-T123PWB-2 the Empirical Rule u £ 30 to estimate o, how many students would you need to sample to estimate the true mean score for the class with 90 percent confidence and an error of £27? About 35 students About 21 students About 88 students Correctl About 25 students Question 5 1/1 pts What is the approximate width of an 90 percent confidence interval for the true population proportion if there are 20 successes in a sample of 807 + .051 Correct! H .080 + .066 + .078 Question 6 1/1 pts Which of the following is not a characteristic of the ¢ distribution? It is @a symmetric distribution. Correctl It approaches z as degrees of freedom decrease. https:/learn.kfo.edu.vn/courses/206/quizzes/3110 3/5

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

3/12/23, 3:27 PM Wrap-Up Quiz 7: Statistics for Business-T123PWB-2 It has a mean of 0. It is a continuous distribution. Question 7 1/1 pts In a random sample of 800 women employees, it is found that 120 would prefer working for a female boss. The width of the 98 percent confidence interval for the proportion of women who prefer a female boss is: + .0155 + .0207 Correct! H .0294 + .0196 Question 8 1/1 pts A company wants to estimate the time its trucks take to drive from city Ato city B. The standard deviation is known to be 10 minutes. What sample size is required in order that the error will not exceed £3 minutes, with 90 percent confidence? 129 observations 139 observations 52 observations Correctl 31 observations https:/learn.kfo.edu.vn/courses/206/quizzes/3110 4/5

3/12/23, 3:27 PM Wrap-Up Quiz 7: Statistics for Business-T123PWB-2 Question 9 171 pts Last week, 100 cars received parking violations in the main university parking lot. Of these, 30 had unpaid parking tickets from a previous violation. Assuming that last week was a random sample of all parking violators, find the 95 percent confidence interval for the percentage of parking violators that have prior unpaid parking tickets. 16.8 to 33.2 percent. Correctl 21.0 to 39.0 percent. 16.3 to 36.7 percent. 19.5 to 30.5 percent. Question 10 1/1 pts A poll showed that 35 out of 100 randomly chosen graduates of California medical schools last year intended to specialize in family practice. What is the width of a 95 percent confidence interval for the proportion that plan to specialize in family practice? H+ .0876 H+ .0736 Correctl H .0935 H+ .0814 Quiz Score: 10 out of 10 https:/learn.kfo.edu.vn/courses/206/quizzes/3110 5/5

Related Documents

Screenshot 2024-05-19 at 10.20.36 PM.png

Screenshot 2024-05-19 at 10.21.08 PM.png

Mini 7_ Hypothesis Testing with Z-statistic.docx

Assignment 1_ Winter 2024 Applied Statistics I.pdf

Assignment 2 STAT1070.pdf

Prior to Class Quiz 6_ Statistics for Business-T123PWB-2.pdf

Sophia - Statistics - Unit 3 - Milestone 3.pdf

Assignment5.pdf

ST3001_E_Sunday submit.docx

Exploring Statistics 13th ed Study Guide - Chapter 4.pdf

Exploring Statistics 13th ed Study Guide - Chapter 1.pdf

MAHT108X_W03 Lesson 5_Summarizing Data.docx

Recommended textbooks for you

Glencoe Algebra 1, Student Edition, 9780079039897...

Algebra

ISBN:9780079039897

Author:Carter

Publisher:McGraw Hill

Algebra & Trigonometry with Analytic Geometry

Algebra

ISBN:9781133382119

Author:Swokowski

Publisher:Cengage

Big Ideas Math A Bridge To Success Algebra 1: Stu...

Algebra

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:Houghton Mifflin Harcourt

Holt Mcdougal Larson Pre-algebra: Student Edition...

Algebra

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

College Algebra (MindTap Course List)

Algebra

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:9781133382119
Author:Swokowski
Publisher:Cengage
Big Ideas Math A Bridge To Success Algebra 1: Stu...
Algebra
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:Houghton Mifflin Harcourt
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning