Introduction to Business Statistics
Introduction to Business Statistics
7th Edition
ISBN: 9781111792374
Author: WEIERS
Publisher: Cengage Learning
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Chapter 4, Problem 4.51CE
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The University of cape town aims to evaluate students’ academic performance. In line with this, you have been appointed as a Consultant to work on the project. The University would want to ascertain how age, gender, work experience, interim assessment scores and examination scores influence students’ overall academic performance. In doing so, you are required to provide answers to the following issues to the University in simple, clear and concise form. As much as possible, provide justification for the choice of your answers.    a. Assuming you will have to collect data from the respondents directly, describe the instrumentation you will use.                                                                         b. Describe the method you will employ in administering the instrument in (a) above.
Jensen Tire & Auto is in the process of deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the following information on weekly usage (hours) and annual maintenance expense (in hundreds of dollars). Weekly Usage(hours) AnnualMaintenanceExpense 13 17.0 10 22.0 20 30.0 28 37.0 32 47.0 17 30.5 24 32.5 31 39.0 40 51.5 38 40.0 test statistic is 6.90 Find the p-value. (Round your answer to three decimal places.) p-value =  State your conclusion. Reject H0. We conclude that the relationship between weekly usage (hours) and annual maintenance expense (in hundreds of dollars) is significant. Do not reject H0. We conclude that the relationship between weekly usage (hours) and annual maintenance expense (in hundreds of dollars) is significant.      Reject H0. We cannot conclude that the relationship between weekly usage…
When I was a student, I was one of a relative minority who worked in addition to going to classes.  That circumstance has changed drastically in the intervening years.  According to several recent studies, almost all students work at least part-time, and many work full-time while enrolled in classes (ACE Center for Policy and Analysis, 2006; Alfano and Eduljee, 2013; Perna, 2010).  Both faculty and administrators are concerned that the shift in focus to the world outside of school can affect academic performance.  We compare the GPA of students who work at least part-time outside of class with those who do not work. What statistical test should be used?

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Introduction to Business Statistics

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