Two major automobile manufacturers have produced compact cars with engines of the same size. We are interested in determining whether or not there is a significant difference in the mean MPG (miles per gallon) when testing for the fuel efficiency of these two brands of automobiles. A random sample of eight cars from each manufacturer is selected, and eight drivers are selected to drive each automobile for a specified distance. The following data (in miles per gallon) show the results of the test. Assume the population of differences is normally distributed.
Driver
Manufacturer A
Manufacturer B
1
32
28
2
27
22
3
26
27
4
26
24
5
25
24
6
29
25
7
31
28
8
25
27
?
The mean of the differences is
A. .5.
B. 1.5.
C. 2.0.
D. 2.5.
Answer: C
You might also like to view...
______ error occurs when the rater evaluates everyone under their control as average.
A. Leniency B. Proximity C. Halo D. Central tendency
James knows that the company’s new widget has a defect in it that will cause it to break after 3 months of use. He decides to say nothing about it because the company really needs the income from the new widget. It appears James’s justification for his unethical behavior is ______.
A. everyone else does it B. I did it for the good of others or the company C. I was only following orders D. I’m not as bad as the others
What kinds of tactics may be used by a union in a union organizing campaign?
What will be an ideal response?
The reason investors buy bonds is to ________
A) earn interest B) own controlling interest in the company C) exercise voting rights in a company D) receive dividend payments