Question

A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of 27 mpg. To see if the goal is being met, they check the gasoline usage of 50 company cars at random, finding a sample mean of 26.12 mpg and a sample standard deviation of 4.83 mpg. We wish to determine if there is strong evidence that they failed to attain their fuel economy goal.

a) Write the appropriate hypotheses for this Hypothesis Test. Be sure to label your variables.

b) Find the P-value. You may use your calculator. Tell me which function you are using.

c) State your conclusions.

Answer #1

A company with a large fleet of cars hopes to keep gasoline
costs down and sets a goal of attaining a fleet average of at least
27 miles per gallon. To see if the goal is being met, they check
the gasoline usage for 70 company trips chosen at random, finding
a mean of 25.45 mpg and a standard deviation of 5.15 mpg. Is this
strong evidence they have failed to attain their fuel economy
goal?
Find the P-Value ____________...

A company with a large effect of cars hopes to keep
gasoline costs down and sets a goal of attaining a fleet average of
at least 26 miles per gallon. To see if the goal is being met, they
check the gasoline usage for 50 company trips chosen at random,
finding a mean of 25.02 mpg and a standard deviation of 4.83 mpg.
Is this strong evidence that they have failed to attain their fuel
economy goal?Thecorrectnullandalternativehypotheses for testing the...

A company with a large fleet of cars hopes to keep gasoline
costs down and sets a goal of attaining a fleet average of at least
25 miles per gallon. To see if the goal is being met, they check
the gasoline usage for 70 company trips chosen at random, finding
a mean of 24.37 mpg and a standard deviation of
4.38 mpg. Is this strong evidence they have failed to attain
their fuel economy goal?
Find the P-value.
The...

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strong evidence that they...

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maintaining their fleet of 150 cars. After testing, the company
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What tools could AA leaders have used to increase their
awareness of internal and external issues?
???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
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