1. A student scored 65 on a calculus test that had amean of 50 and a standard deviation of 10. Shescored 30 on a statistics test with a mean of 25and a standard deviation of 5. Compare herpositions on the two tests.2. The grade point averages of students participatingin college sport programs are compared. Thedatashown below. At 0.05 level ofconfidence, can one conclude that there is asignificant variance in the mean GPA of the threegroups? If there is, determine the significancebetween means using Scheffe's test.Volleyball2.52.32.31.73.1Urban12SubRural89urbanBasketballNo CollegeLocationdegree Advance degree82.573.73.03.83.23. A sociologist wishes to see whether the number ofyears of college a person has completed isrelated to his or her place of residence. A sampleof 70 people is selected and classified as shown.Table Tennis1.615862.51.82.41.8Four Year

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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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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.
A student takes a test in his math course and scores 45 points and a test in his psychology courseand scores 71 points. Scores on each test were normally distributed. On the math test the classhas a mean of 40 and a standard deviation of 15. On the psychology test the class has a mean of 75and a standard deviation of 10. On which test did the student do better?
According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the standard deviation is 3 inches. If Zsike is 67 inches tall, what is her z-score?
Mariah and Amanda began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Mariah took a test in English and earned a 81, and Amanda took a test in Art History and earned a 61.8. Use the fact that all the students' test grades in the English class had a mean of 75.7 and a standard deviation of 9, and all the students' test grades in Art History had a mean of 60.7 and a standard deviation of 10.3 to answer the following questions.a) Calculate the z-score for Mariah's test grade.z=b) Calculate the z-score for Amanda's test grade.z=c) Which person did relatively better? Mariah Amanda They did equally well.
Jared has a mean of 74 on his quizzes, with a standard deviation of 7. On his most recent quiz, he scored a 65. Is this unusual compared to how he usually performs on quizzes?
Use z scores to compare the given values. The tallest living man at one time had a height of 225 cm. The shortest living man at that time had a height of 104.3 cm. Heights of men at that time had a mean of 173.55 cm and a standard deviation of 5.15 cm. Which of these two men had the height that was more extreme? Since the z score for the tallest man is z= and the z score for the shortest man is z= the V man had the height that was more extreme. (Round to two decimal places.)
My Physics professor announced that top 18% will get A in the class. Class mean is 72, and standard deviation is 6. To get the grade A, what score should I get at least?
A standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny has a score of 143. What is her z score and what percentage of students scored lower than her?
Suppose that Jett achieves a score of 1250 on the SAT, and his sister Kate scores 29 on the ACT. The SAT scores are normally distributed with a mean of 1100 and standard deviation of 250. The ACT scores are normally distributed with a mean of about 20 and standard deviation of 5. Who did better, relative to their peers?
Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
Suppose you are told that you scored two standard deviations below the mean on a measure where the mean was 90 and the standard deviation was8. What is your score?

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1. A student scored 65 on a calculus test that had a mean of 50 and a standard deviation of 10. She scored 30 on a statistics test with a mean of 25 and a standard deviation of 5. Compare her positions on the two tests.