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 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 P-value is ____________________

- Explain what the P-value means in this context.

Choose the correct answer below.

A. The P-value is the probability that the mean mileage of the fleet is greater than or equal to the proposed mean of 25 mpg.

B. The P-value is the probability that the mean mileage of the fleet is 24.37 mpg rather than the proposed mean of 25 mpg.

C. The P-value is the probability of obtaining a sample mean of 24.37 mpg or less if the mean mileage of the fleet is 25 mpg.

D. The P-value is the probability of obtaining a sample mean of 24.37 mpg or more if the mean mileage of the fleet is 25 mpg.

3. State an appropriate conclusion.

Since the P-value is (1) ___________ than any reasonable level of significance, the data (2) _________ sufficient evidence to reject the null hypothesis.

(1)

Less or greater

(2)

fail to provide or provide

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 fleet of cars hopes to keep gasoline
costs down and sets a goal of attaining an average gas mileage of
at least 29 mpg. To see if the goal is being met, they check the
gasoline usage for 54 company trips chosen at random, finding a
mean of 26.766 mpg and a standard deviation of 8.087 mpg. Does the
sample provide convincing evidence the mean gas mileage is less
than the goal set? Use a...

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 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...

Congress regulates corporate fuel economy and sets an annual
gas mileage for cars. A company with a large fleet of cars hopes to
meet the 2011 goal of 30.2 mpg or better for their fleet of cars.
To see if the goal is being met, they check the gasoline usage for
50 company trips chosen at random from over 1000 trips, finding a
mean of 32.12 mpg and a standard deviation of 4.83 mpg. Is this
strong evidence that they...

5. Congress regulates corporate fuel economy and sets an annual
gas mileage for cars. A company with a large fleet of cars hopes to
meet the 2011 goal of 30.2mpg or better for their fleet of cars. To
see if the goal is being met, they check the gasoline usage for 50
company trips chosen at random, finding a mean of 32.12mpg and a
standard deviation of 4.83mpg. In this strong evidence that they
have attained their fuel economy goal?...

A limousine company is concerned with increasing costs of
maintaining their fleet of 150 cars. After testing, the company
found that the emissions systems of 17 out of the 29 cars they
tested failed to meet pollution control guidelines. They had
forecasted costs assuming that a total of 15 cars would need
updating to meet the latest guidelines. Is this strong evidence
that more than 10 % of the fleet might be out of compliance? Test
an appropriate hypothesis and...

A hospital was concerned about reducing its wait time. A
targeted wait time goal of 25 minutes was set. After implementing
an improvement framework and? process, a sample of 364 patients
showed the mean wait time was 23.06 ?minutes, with a standard
deviation of 16.4 minutes. Complete parts? (a) and? (b) below. a.
If you test the null hypothesis at the 0.10 level of? significance,
is there evidence that the population mean wait time is less than
25 ?minutes? State...

The Gidget Company makes widgets. If the production process is
working properly, it turns out that the widgets are normally
distributed with a mean length of at least 3.3 feet. Larger widgets
can be used or altered but shorter widgets must be scrapped. You
select a sample of 25 widgets, and the mean length is 3.28 feet
and the sample standard deviation is 0.18 foot. Do you need to
adjust the production equipment? Complete parts (a) through
(d).
a. If...

Delta airlines case study
Global strategy. Describe the current global
strategy and provide evidence about how the firms resources
incompetencies support the given pressures regarding costs and
local responsiveness. Describe entry modes have they usually used,
and whether they are appropriate for the given strategy. Any key
issues in their global strategy?
casestudy:
Atlanta, June 17, 2014. Sea of Delta employees and their
families swarmed between food trucks, amusement park booths, and
entertainment venues that were scattered throughout what would...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 15 minutes ago

asked 15 minutes ago

asked 29 minutes ago

asked 37 minutes ago

asked 41 minutes ago

asked 42 minutes ago

asked 52 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago