Markus is not as smart as hisfriends in class so he wants totake private lessons to his friendsas his teacher. Here's Mark'sability to answer questions10, 15, 18, 7, 8 10, 9, 11Before the private course, Mark'sability to answer questions was8 minutes. Use a significancelevel of 5% and data on the abilityto answer Mark's questionsin the minutes above to testthe claim that the standarddeviation of ability to answerMark's questions is less than 8.(Work with a complete manualprocess. Excel and the like arenot allowed).

Given : we will calculate the standard deviation of the data sample size, n = 8 Sum, Σx = 88 Mean,…

Answered: Markus is not as smart as his friends…

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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Similar questions

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?
Brianna and Miranda began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Brianna took a test in Art History and earned a 78.3, and Miranda took a test in Social Studies and earned a 61.2. Use the fact that all the students' test grades in the Art History class had a mean of 71.3 and a standard deviation of 11.7, and all the students' test grades in Social Studies had a mean of 62.3 and a standard deviation of 8.2 to answer the following questions. a) Calculate the z-score for Brianna's test grade. [Round your answer to two decimal places.] = 2 b) Calculate the z-score for Miranda's test grade. [Round your answer to two decimal places.] c) Which person did relatively better? Brianna O Miranda They did equally well. Submit Question logi $22 3 FI F5 F7 % & W R T. Y. こ9 * CO
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.
Raul received a score of 77 on a history test for which the class mean was 70 with a standard deviation of 9. He received a score of 75 on a biology test for which the class mean was 70 with standard deviation 4. On which test did he do better relative to the rest of the class
Suppose that the mean score of a class of 34 students was 73. The 19 male students in the class had a mean score of 72. What was the mean score for the 15 female students? Mean Score for Female Students =
Suppose that the mean score of a class of 28 students was 77. The 16 male students in the class had a mean score of 64. What was the mean score for the 12 female students? Mean Score for Female Students =
Please also explain why you determined whether or not the results are statistically significant. The mean score on a psychological characteristic for women is 25 (SD = 5) and the mean score for men is 24 (SD = 5). There were 12 women and 10 men in this study.
Aaliyah and Lloyd began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Aaliyah took a test in Social Studies and earned a 79.8, and Lloyd took a test in Science and earned a 68.4. Use the fact that all the students' test grades in the Social Studies class had a mean of 74.1 and a standard deviation of 9.6, and all the students' test grades in Science had a mean of 60.9 and a standard deviation of 8.6 to answer the following questions. a) Calculate the z-score for Aaliyah's test grade. 2 = [Round your answer to two decimal places.] b) Calculate the z-score for Lloyd's test grade. 2 = [Round your answer to two decimal places.] c) Which person did relatively better? O Aaliyah O Lloyd O They did equally well.
Rachael and Autumn began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Rachael took a test in English and earned a 81.8, and Autumn took a test in Math and earned a 63.6. Use the fact that all the students' test grades in the English class had a mean of 71.3 and a standard deviation of 11.4, and all the students' test grades in Math had a mean of 60.2 and a standard deviation of 8.3 to answer the following questions. a) Calculate the z-score for Rachael's test grade.z=z= b) Calculate the z-score for Autumn's test grade.z=z= c) Which person did relatively better? RachaelAutumnThey did equally well.
Marjorie More Mileage is obsessed with getting the best gas mileage possible for her 2017 Toyota Prius. She learns from the official Toyota web site that the official average mileage for all 2017 Prius is = 58.2 mpg with a standard deviation of = 1.2 mpg. Marjorie purchased a set of “hyper mileage” tires on-line that are supposed to improve gas mileage. For the next 100 fill ups, Marjorie noticed an average gas mileage of = 58.5 mpg. Help Marjorie perform a hypothesis test at a 1% level of significance to determine if her new tires actually improved her gas mileage. What is the null hypothesis? What is the alternate hypothesis? Is this a left tail, right tail, or two tail test? Calculate the test statistic. State your conclusion.
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.
X f 30 – 39 2 40 – 49 0 50 – 59 1904250514 60 – 69 25 70 – 79 -1545275226 80 – 89 -185591532 90 – 99 -173383669 100 – 109 6 Remember, before answering these questions, you should be sure to create the cumulative GFDT and the cumulative relative GFDT. (1) Which class contains the 35th percentile? (2) What is the lower real limit of this class? (3) What is the frequency of this class? (4) What is the cumulative frequency of the class just below this one? (5) What is the sample size for this data set? (6) What is the class width of this GFDT? With this information, what is the estimate for the 35th percentile?P35 =

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