A company in Maryland has developed a device that can be attached to car engines, which it believes will increase the miles per gallon that cars will get
The owners are interested in estimating the difference between mean mpg for cars using the device versus those that are not using the device. The following data represent the mpg for independent random samples of cars from each population. The variances are assumed equal and the populations normally distributed.With Device Without Device22.6 26.923.4 24.428.4 20.829.0 20.829.3 20.220.0 26.0 28.1 25.6Given this data, what is the critical value if the owners wish to have a 90 percent confidence interval estimate?A) t = 2.015
B) t = 1.7823
C) z = 1.645
D) z = 1.96
B
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According to Maslow's Hierarchy, a sales manager's habit of giving fancier automobiles to his/ her senior salespeople is an example of an attempt to satisfy their "belongingness and social needs."
a. true b. false
You are job-sharing with a co-worker, Dave. Which of the following is true about this working arrangement?
A) You and Dave divide the job's responsibilities, hours, and benefits between the two of you. B) You and Dave work for a temporary agency, which splits assignments between the two of you. C) You and Dave are responsible for managing yourselves and your assigned projects. D) You and Dave divide the job's responsibilities but neither of you receives any health benefits.