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 sample has a mean of 230 and a median of 290. If one person with a score of 10 is removed from this sample, which of the following is most likely? The mean and median will decrease equally. The mean will certainly stay the same, but the median will either decrease or stay the same. The mean will certainly increase. The median might also increase, but not as much as the mean. The mean will not change, but the median will likely increase. The mean will certainly decrease. The median might also decrease, but not as much as the mean. The mean and median will increase equally. The mean will certainly increase, and the median will likely decrease.
Suppose that 10 students have taken an exam and that the mean and median scores are both 60. (Since 10 is an even number you can assume that two scores in the middle are both 60.) Two more students take it and one scores 70 and the other scores 26. If these students are now included, what is the new mean? What is the new median?
On the past mathematics test, the bottom 20% of students failed to pass the test. The mean for the test was 55 and the standard deviation was 11. what was the passing score
A mathematics professor lost a test paper belonging to one of her students. She remembered that the mean score for the class of 20 was 81 and that the sum of the 19 other scores was 1530. What was the grade on the paper she lost?
Miranda and Alma began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Miranda took a test in Social Studies and earned a 71.5, and Alma took a test in Art History and earned a 66.6. Use the fact that all the students' test grades in the Social Studies class had a mean of 70.6 and a standard deviation of 9.6, and all the students' test grades in Art History had a mean of 62.7 and a standard deviation of 10.5 to answer the following questions. a) Calculate the z-score for Miranda's test grade. [Round your answer to two decimal places.] b) Calculate the z-score for Alma's test grade. [Round your answer to two decimal places.] c) Which person did relatively better? O Miranda O Alma O They did equally well. Submit Question IN
Miranda and Karla began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Miranda took a test in Social Studies and earned a 71.4, and Karla took a test in Art History and earned a 60.9. Use the fact that all the students' test grades in the Social Studies class had a mean of 75.3 and a standard deviation of 10.7, and all the students' test grades in Art History had a mean of 66.4 and a standard deviation of 10.3 to answer the following questions.a) Calculate the z-score for Miranda's test grade.z=b) Calculate the z-score for Karla's test grade.z=c) Which person did relatively better? Miranda Karla They did equally well.
Lloyd and Tara began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Lloyd took a test in Social Studies and earned a 77.1, and Tara took a test in Math and earned a 66.4. Use the fact that all the students' test grades in the Social Studies class had a mean of 75.5 and a standard deviation of 10.5, and all the students' test grades in Math had a mean of 65.3 and a standard deviation of 8.8 to answer the following questions.a) Calculate the z-score for Lloyd's test grade.�=b) Calculate the z-score for Tara's test grade.�=c) Which person did relatively better? Lloyd Tara They did equally well.
Tom scored a 115 on a measure of math ability and a 40 on a measure of verbal ability. The means and standard deviations on the measure of math ability and verbal ability are M = 95, s = 15 and M = 35, s = 2.95, respectively. In which area did Tom do better?
An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 82 and in math 89. The overall results on the economics exam had a mean of 70 and a standard deviation of 7, while the mean math score was 69, with a standard deviation of 10. On which exam did she do better compared with the other students?
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.
In Statsville there’s a city-wide speed limit of 30 mph.If you are caught speeding the fine is $100 plus $10 forevery mile per hour you were over the speed limit. Forexample, if you’re ticketed for going 45 mph, your fine is100 + 10145 - 302 = +250. Last month all the driverswho were fined for speeding averaged 42 mph with astandard deviation of 7 mph. What were the mean andstandard deviation of the fines?A) $120 and $70 B) $220 and $7C) $220 and $70 D) $220 and $170E) $420 and $70
Arthur has two children, Zeke and Lucy, who competed in a track meet. The results were as follows: Zeke ran the 400 m event in 55.9 seconds. The mean time for all runners was 56.6 seconds and the standard deviation was 2.07 seconds. Lucy ran the 200 m event in 26.4 seconds. The mean time for all runners was 27.8 seconds and the standard deviation was 1.81 seconds. What was the z-score for Zeke's time? What was the z-score for Lucy's time? Who ran a better race, relatively speaking? O Zeke O Lucy

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