11 May BASED ON THIS INFORMATION, WHAT IS THE VALUE OF THE TEST STATISTIC?
Mike runs for the president
of the student government and is interested to know whether the
proportion of the student body in favor of him is significantly more
than 50 percent. A random sample of 100 students was taken. Fifty-five
of them favored Mike. At a 0.05 level of significance, it can be
concluded that the proportion of the students in favor of Mike
(1 point)
is significantly greater than 50 percent
because 55 percent of the sample favored him.
is not significantly greater than 50
percent.
is not significantly different from 55
percent.
is significantly greater than 55 percent.
Score:
1
2)
Companies must take special
care when dealing with customization issues because:
(1 point)
maintaining and upgrading customizations
can be troublesome.
customizations can be costly.
All of the above.
new vanilla versions must be continually
upgraded to accommodate the customization.
Score:
1
3)
It is believed that the SAT
scores for students entering two state universities may have
different standard deviations. Specifically, it is believed that the
standard deviation at University A is greater than the standard deviation
at University B. To test this using an alpha = 0.05 level, a sample
of 14 student SAT scores from University A was selected and a sample
of 8 SAT scores from University B was selected. The following sample
results were observed:
University A University B
= 1104= 1254
s =134 s= 108
Based on this information, what is the value of the test statistic?
(1 point)
None of the above.
1.5394
0.6496
1.2407
Score:
1
4)
________ can be accomplished by
integrating multiple business processes in ways that enable firms to
meet a wide range of unique customer needs.
(1 point)
Strategic information planning
Process reengineering
Economies of scale
Competitive advantage
Score:
1
5)
A contract calls for the mean
diameter of a cylinder to be 1.50 inches. As a quality check, each
day a random sample of n = 36 cylinders is selected and the diameters
are measured. Assuming that the population standard deviation is
thought to be 0.10 inch and that the test will be conducted using an
alpha equal to 0.025, what would the probability of a Type II error
be?
(1 point)
Approximately 0.1267
About 0.6789
0.975
Can’t be determined without knowing the
“true” population mean.
Score:
1
6)
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.
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