**4.** Tanya took a quiz in her history class. The mean was 72 points, and the standard deviation was 10 points. Olga scored 86 points on a quiz in her science class, which had a mean of 74 points and a standard deviation of 5 points. What is the minimum score that Tanya should have earned to score relatively higher than Olga?**5.** Letitia swam the girls 100m freestyle in 56.5 seconds. Ben swam the boys 100m freestyle in a time of 50.3 seconds. The mean time for the girls 100m at the swim meet was 58.6 seconds with a standard deviation of 2.3 seconds. The mean time for the boys 100m at the swim meet was 52.1 with a standard deviation of 1.8. Who swam the faster relative time?

Answered: Image /qna-images/answer/ab476906-39f5-4ff3-8c9f-d84411f967db.jpg

Answered: 4. Tanya took a quiz in her history…

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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Pattys final exams have an average of 78 and a standard deviation of 6. If she wants 4% of her class to get an A on the final exam, what should be the cut off score for an A?
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.
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=
Suppose that the mean score of a class of 34 students was 78. The 19 male students in the class had a mean score of 66. What was the mean score for the 15 female students? Mean Score for Female Students
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
The first exam for a Stats course had a mean of 80 and a standard deviation of 4 points; the second had a mean of 70 and a standard deviation of 15 points. Reginald scored an 80 on the first test and an 85 on the second. Sara scored an 88 on the first but only a 65 on the second. Although Reginald's total score is higher, Sara feels she should get the higher grade. Explain her point of view.
Neil scored 67 on his calculus class final and was devastated by his failing grade. His class distribution had a mean of 54 and a standard deviation of 7. Greg was quite proud of his score of 88 for his Spanish language class. His class distribution had a mean of 97 with a standard deviation of 6. a. Which student did better relative to their class?
Jason's z- score in the 10-k run was -3. if the raw score standard deviation was 5, and the mean running time for the competitors was 55 minutes, what was Jason's raw score running time?
Suppose that the mean score of a class of 35 students was 74. The 18 male students in the class had a mean score of 66. What was the mean score for the 17 female students? Mean Score for Female Students =
Kyle and Caleb began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Kyle took a test in Math and earned a 73.9, and Caleb took a test in Art History and earned a 70.5. Use the fact that all the students' test grades in the Math class had a mean of 73 and a standard deviation of 9,4, and all the students' test grades in Art History had a mean of 62 and a standard deviation of 10.3 to answer the following questions. * a) Calculate the z-score for Kyle's test grade. = 2 b) Calculate the z-score for Caleb's test grade. c) Which person did relatively better? O Kyle O Caleb O They did equally well. MacBook Pro 00 000 esc F4 F5 F6 F7 F1 F2 F3 24 4 %23 tab caps lock C2
Person A scores 78 on an exam that has a mean of 70 and a standard deviation of 5. Person B scores 38 on an exam that has a mean of 32 and a standard deviation of 3. Explain who did better on their exam compared to their classmates person A or B.
2) After doubling all of the scores, the mean was found to be 28 and the standard deviation was 4. What were the values for the mean and SD before the change? Explain

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