The first exam for a Stats course had a mean of 80 and a standard deviation of 4 points; thesecond had a mean of 70 and a standard deviation of 15 points. Reginald scored an 80 on the firsttest and an 85 on the second. Sara scored an 88 on the first but only a 65 on the second. AlthoughReginald's total score is higher, Sara feels she should get the higher grade. Explain her point ofview.

To identify the appropriate ranks of Reginald and Sara, the z-score, which provides the positional…

Answered: The first exam for a Stats course had a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below. Pierce got a score of 71.5; this version has a mean of 62.5 and a standard deviation of 15. Vincent got a score of 309.2; this version has a mean of 294 and a standard deviation of 19. Norma got a score of 7.96; this version has a mean of 7.2 and a standard deviation of 0.4. If the company has only one position to fill and prefers to fill it with the applicant who performed best on the aptitude test, which of applicants should be offered the job?
Please solve using R
CO LO Translate Mikayla and April began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Mikayla took a test in Science and earned a 78.6, and April took a test in English and earned a 61.3. Use the fact that all the students' test grades in the Science class had a mean of 75.6 and a standard deviation of 11.8, and all the students' test grades in English had a mean of 65.3 and a standard deviation of 9.6 to answer the following questions. a) Calculate the z-score for Mikayla's test grade. [Round your answer to two decimal places.] 三2 b) Calculate the z-score for April's test grade. [Round your answer to two decimal places,] 三2 c) Which person did relatively better? Mikayla O April O They did equally well. Submit Question 52°F Clou +56 五。 Or
Lucille, Rocio, and Cristina are all taking College Mathematics but from different professors. They all recently took a statistics exam and the exam scores were normally distributed in each of their classes. Lucille's class had an average grade of 85 and the standard deviation was 3. Lucille earned 89.5 on the exam. Rocio's class had an average grade of 83 and the standard deviation was 4. Rocio earned 87.4 on the exam. Cristina's class had an average grade of 76 and the standard deviation was 6. Cristina earned 79.3 on the exam. Since some professors give harder exams than others, these students decided to use statistics to figure out who did the best on their exam.
Erik and Juan began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Erik took a test in Social Studies and earned a 72.8, and Juan took a test in Science and earned a 66.9. Use the fact that all the students' test grades in the Social Studies class had a mean of 72.2 and a standard deviation of 11.1, and all the students' test grades in Science had a mean of 64.2 and a standard deviation of 11 to answer the following questions.a) Calculate the z-score for Erik's test grade.z=z= [Round your answer to two decimal places.]b) Calculate the z-score for Juan's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Erik Juan They did equally well.
Two 2017 high school graduates want to compare their results on college entrance exams. Alex scored 1401 on the SAT, and Olivia scored 32 on the ACT. For 2017, the mean SAT score was 1060, and the standard deviation was 195. That same year, the ACT had a mean score of 21.0 and a standard deviation of 5.6. Calculate a z-score for each student, determine which student had the better test score, and explain why.
On a nationwide math test, the mean was 57 and the standard deviation was 4. If Roberto scored 90, what was his z-score?
Lucas and Alex began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Lucas took a test in Math and earned a 73.4, and Alex took a test in English and earned a 70.5. Use the fact that all the students' test grades in the Math class had a mean of 74.1 and a standard deviation of 11.3, and all the students' test grades in English had a mean of 60.9 and a standard deviation of 8.1 to answer the following questions.a) Calculate the z-score for Lucas's test grade.z=z=b) Calculate the z-score for Alex's test grade.z=z=
The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances that someone is earning more than $20 an hour?
A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. What proportion of people scores in the A range (90 or above)?
On a verbal skill test, the mean was 72 and the standard deviation was 7. If John scored 75, what was his z-score?
April and Heather began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. April took a test in Science and earned a 74.4, and Heather took a test in English and earned a 69.7. Use the fact that all the students' test grades in the Science class had a mean of 71.3 and a standard deviation of 8.9, and all the students' test grades in English had a mean of 60.5 and a standard deviation of 8.5 to answer the following questions. a) Calculate the z-score for April's test grade. b) Calculate the z-score for Heather's test grade. c) Which person did relatively better? April Heather O They did equally well. Submit Question logi $22 *3 F4 F8 7. 8. %4

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

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

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

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

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

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

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS