Dakota and Bill began arguing about who did better on their tests, but they couldn't decide who did bettergiven that they took different tests. Dakota took a test in Science and earned a 79.9, and Bill took a test inMath and earned a 63.5. Use the fact that all the students' test grades in the Science class had a mean of73.5 and a standard deviation of 11.4, and all the students' test grades in Math had a mean of 67 and astandard deviation of 8.3 to answer the following questions.a) Calculate the z-score for Dakota's test grade.[Round your answer to two decimal places.]b) Calculate the z-score for Bill's test grade.[Round your answer to two decimal places.]c) Which person did relatively better?O DakotaO BillO They did equally well.Submit Question3

Answered: Image /qna-images/answer/ef729bf6-e3f6-4439-b5b7-cd120c8b8268.jpg

Answered: Dakota and Bill began arguing about who…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A class of 5 students averaged 70% on a given test. A class of 9 students averaged 80% on the same test. What would a class of 4 students have to average on the same test if the overall (weighted) mean was 74.33?
Please answer B, C, & D.
Lauren and Chelsea began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Lauren took a test in Math and earned a 75, and Chelsea took a test in Social Studies and earned a 70. Use the fact that all the students' test grades in the Math class had a mean of 76.4 and a standard deviation of 9.8, and all the students' test grades in Social Studies had a mean of 63.4 and a standard deviation of 9.6 to answer the following questions.a) Calculate the z-score for Lauren's test grade.z=z=b) Calculate the z-score for Chelsea's test grade.z=z=c) Which person did relatively better? Lauren Chelsea They did equally well.
On a nationwide math test, the mean was 51 and the standard deviation was 4. If Roberto scored 85, what was his z-score?
On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90, what was his z-score?
A human resources manager for a company had a choice of how to administer an aptitude test for employee recruits. The New form of the test was administered via computer. The Old form had the same content, but was delivered via paper and pencil. The manager wanted to know if the tests were equivalent in terms of mean scores. If they were equivalent, the manager could give the test by either method, but if they were not equivalent, the manager would have to stick with one administration method in order to be fair to all recruits taking the test. The manager formed his hypotheses, and set an alpha level of .05. The results of a hypothesis test using the two administration methods is shown below. What should the manager do? t-Test: Two-Sample Assuming Equal Variances New Old Mean 15 11.1 13.33333 18.76667 Variance Observations 10 10 Pooled Variance 16.05 Hypothesized Mean Difference df 18 t Stat 2.176768 P(T<=t) one-tail t Critical one-tail 0.021526 1.734064 P(T<=t) two-tail t Critical…
Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte scored a 688 on a test with a mean of 493 and a standard deviation of 150. What score would I have to get on a test with a mean of 85 and a standarddeviation of 15 to have the best score out of the three of us?
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?
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
The year Lamar graduated college, he got a job as an entry-level software engineer working for a firm in the United States. His starting salary was $93,500. For the year Lamar graduated, the starting salaries of all entry-level software engineers in the United States had a mean of $90,000 and a standard deviation of $3300. Find the Z-score of Lamar's starting salary relative to the starting salaries among all the entry-level software engineers in the United States for the year Lamar graduated. Round your answer to two decimal places. z= 0 ك
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.
On a nationwide math test, the mean was 57 and the standard deviation was 4. If Roberto scored 90, what was his z-score?

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