Question

Dylan Jones kept careful records of the fuel efficiency of his new car. After the first six times he filled up the tank, he found the mean was 20.5 miles per gallon (mpg) with a sample standard deviation of 0.6 mpg.

- Compute the 90% confidence interval for his mpg. (Use
*t*Distribution Table.)**(Round your answers to 3 decimal places.) Confidence interval for his mpg________and_______** - How many times should he fill his gas tank to obtain a margin
of error below 0.05 mpg? (Use
*z*Distribution Table.)**(Round your answer to the next whole number.)**

Answer #1

Dylan Jones kept careful records of the fuel efficiency of his
new car. After the first twelve times he filled up the tank, he
found the mean was 26.1 miles per gallon (mpg) with a sample
standard deviation of 1.0 mpg.
Compute the 98% confidence interval for his mpg.
How many times should he fill his gas tank to obtain a margin of
error below 0.15 mpg?

Dylan Jones kept careful records of the fuel efficiency of his
new car. After the first ten times he filled up the tank, he found
the mean was 25.3 miles per gallon (mpg) with a sample standard
deviation of 0.8 mpg.
1) Compute the 90% confidence interval for his mpg.
(Round your answers to 3 decimal places.)
The confidence interval is between ___ and ___.
2) How many times should he fill his gas tank to obtain a margin
of...

. Computers in some vehicles calculate various quantities
related to performance. One of these is fuel efficiency, or gas
mileage, usually expresses as miles per gallon (mpg). For one
vehicle equipped in this way, the miles per gallon were recorded
each time the gas tank filled, and the computer was then reset.
Here are the mpg values for a random sample of 20 of these
records:
41.5
50.7
36.6
37.3
34.2
45.0
48.0
43.2
47.7
42.2
43.2
44.6
48.4
46.4...

Computers in some vehicles calculate various quantities related
to performance. One of these is the fuel efficiency, or gas
mileage, usually expressed as miles per gallon (mpg). For one
vehicle equipped in this way, the miles per gallon were recorded
each time the gas tank was filled, and the computer was then reset.
In addition to the computer's calculations of miles per gallon, the
driver also recorded the miles per gallon by dividing the miles
driven by the number of...

To test whether acetone improves fuel efficiency in passenger
cars, 10 people were randomly selected. Each person brings his/her
car to a gas station and fills it with gas. The carâ€™s mileage is
recorded. When the car is nearly empty, the person takes the car
back to the gas station and refills it. Mileage and miles per
gallon are recorded. Acetone is added to the tank. When the tank is
nearly empty, the person returns to the gas station and...

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...

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