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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Answered: 1. A student scored 65 on a calculus…

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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Use z scores to compare the given values. The tallest living man at one time had a height of 227 cm. The shortest living man at that time had a height of 98.2 cm. Heights of men at that time had a mean of 172.36 cm and a standard deviation of 5.76 cm. Which of these two men had the height that was more extreme? and the z score for the shortest man is z = the man had the height that was more extreme. Since the z score for the tallest man isz = (Round to two decimal places.)
Do you prefer taking tests on paper or online? A college instructor gave identical tests to two randomly sampled groups of 50 students. One group took the test on paper and the other took it online. Those who took the test on paper had an average score of 68.4 with a standard deviation of 12.1. Those who took the test online had an average score of 71.3 with a standard deviation of 14.2. Can you conclude that the mean scores differ between online and paper tests?
2. On the final exam, your friend scored a 93 and you scored a 85. The scores are normally distributed with a mean of 90 and a standard deviation of 10. What percentage of students scored between you and your friend?
Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
Suppose the scores of students on a Statistics course are Normally distributed with a mean of 400 and a standard deviation of 42. What percentage of the students scored between 316 and 400 on the exam? (Give your answer to 3 significant figures.) percent.
The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. A. How many standard deviations above the mean is your score?
2. Alfred scored 82 in a quiz in English for which the average Score of the class was 75 with a standard deviation of 10. He also took a quiz in Statistics and scored 70 for which the average score of the class was 55, and the standard deviation was 14. Relative to other students in the class, did Alfred do better in English or Statistics?
Two students take qualifying exams. Student A got a score of 144 with a mean of 128 and a standard deviation of 34.47. Student B got a score of 90 with a mean of 86 and a standard deviation of 18. 22. Which student performed better?
Raul received a score of 79 on a history test for which the class mean was 70 with a standard deviation of 7. He received a score of 79 on a biology test for which the class mean was 70 with standard deviation 9. On which test did he do better relative to the rest of the class? A. biology test B. history test C. the same
In class A, Jamir got 85 for his first test. Jamir's class mean was 75 and the standard deviation was 5.In class B, Laurabelle got 80 in her first test. Laurabelle's class mean was 50 and the standard deviation was 10.In a fair comparison of the two students in two different classes, who did better in his or her test. (Compare Jamir and Laurabelle's standing in their classes.Note Z-score gives that information.) Jamir Laurabelle Both did the same none of the above
Rebecca and Emma began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Rebecca took a test in English and earned a 71, and Emma took a test in Social Studies and earned a 70.4. Use the fact that all the students' test grades in the English class had a mean of 71.5 and a standard deviation of 10.7, and all the students' test grades in Social Studies had a mean of 64.1 and a standard deviation of 9.5 to answer the following questions. a) Calculate the z-score for Rebecca's test grade. b) Calculate the z-score for Emma's test grade. = Z c) Which person did relatively better? Rebecca O Emma O They did equally well.

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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.