Assessment Brief
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Assume that you are
working for the Consumer Protection Agency and have recently been getting
complaints about the highway gas mileage of the new Dodge Caravans. Chrysler
Corporation agrees to allow you to randomly select 40 of its new Dodge Caravans
to test the highway mileage.
Page 469
Chrysler claims that the
Caravans get 28 mpg on the highway. Your results show a mean of 26.7 and a
standard deviation of 4.2. You support Chrysler’s claim.
1.
Show whether or not you support Chrysler’s claim by listing theP-value
from your output. After more complaints, you decide to test the variability of
the miles per gallon on the highway. From further questioning of Chrysler’s
quality control engineers, you find they are claiming a standard deviation of
no more than 2.1. Use a one-tailed test.
2.
Test the claim about the standard deviation.
3.
Write a short summary of your results and any necessary action
that Chrysler must take to remedy customer complaints.
4.
State your position about the necessity to perform tests of
variability along with tests of the means.
Dissertation chapter by chapter, or full document — we deliver.
PhD-qualified writers handle every part of your dissertation: literature review, methodology, data analysis, and discussion. We align with your university's format requirements and provide a model you can confidently reference throughout your research.
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