Question

A consumer group claims that the mean acceleration time from 0 to 60 miles per hour for a sedan is 6.8 seconds. A random sample of 33 sedans has a mean acceleration time from 0 to 60 miles per hour of 7.6 seconds. Assume the population standard deviation is 2.3 seconds. Find the standardized test statistic and the corresponding p-value.

z-test statistic = -1.998, p-value = 0.023 |

z-test statistic = 1.998, p-value = 0.046 |

z-test statistic = -1.998, p-value = 0.046 |

z-test statistic = 1.998, p-value = 0.023 |

Answer #1

A consumer group claims that the mean minimum time it takes for
a sedan to travel a quarter mile is greater than
14.514.5
seconds. A random sample of
2222
sedans has a mean minimum time to travel a quarter mile of
15.415.4
seconds and a standard deviation of
2.112.11
seconds. At
alphaαequals=0.050.05
is there enough evidence to support the consumer group's claim?
Complete parts (a) through (d) below. Assume the population is
normally distributed.

What are the factors that determine the acceleration time (in
sec.) from 0 to 60 miles per hour of a car? Data on the following
variables for 30 different vehicle models were collected:
Y (Accel Time): Acceleration time in sec.
X1(Engine Size): c.c.
X2 (Sedan): 1 if the vehicle model is a sedan
and 0 otherwise
The regression results using acceleration time as the dependent
variable and the remaining variables as the independent variables
are presented below.
The various residual...

The Tesla Model S P100D with Ludicrous+ can accelerate
from 0 to 60 miles/hour in about 2.28 seconds. If the maximum
acceleration is proportional to the difference between the top
speed of 155 miles/hour and the current speed, then
a) Give the DE with IC's for the acceleration of the
car, then solve it.
b) Based on your answer to part (a), what would be the
time for the car to accelerate from 0 to 100 miles/hour and the
time...

A consumer agency claims that the average fuel mileage of Sedan
A exceeds that of Sedan B. To test this claim, a random sample of
18 Sedan A vehicles were tested and the sample mean fuel mileage
was found to be 26.60 miles per gallon with a known population
standard deviation of 1.43 miles per gallon. A random sample of 13
Sedan B vehicles also were tested and the sample mean fuel mileage
was found to be 25.60 miles per...

A consumer agency claims that the average fuel mileage of Sedan
A exceeds that of Sedan B. To test this claim, a random sample of
14 Sedan A vehicles were tested and the sample mean fuel mileage
was found to be 25.30 miles per gallon with a known population
standard deviation of 1.45 miles per gallon. A random sample of 17
Sedan B vehicles also were tested and the sample mean fuel mileage
was found to be 24.10 miles per...

At time 0, Car A is travelling at 100 miles per hour and Car B
is travelling at 20 miles per hour. One minute later, Car A is
travelling at 80 miles per hour and Car B is travelling at 100
miles per hour. Show that there is a moment during that minute
where Cars A and B are travelling at the exact same speed. (Note:
We assume that the speed of a car is a continuous function of
time.)...

Example 2: An energy company wants to choose between two regions
in a state to install energy-producing wind turbines. A researcher
claims that the wind speed in Region A is less than the wind speed
in Region B. To test the regions, the average wind speed is
calculated for 60 days in each region. The mean wind speed in
Region A is 13.9 miles per hour. Assume the population standard
deviation is 2.9 miles per hour. The mean wind speed...

Business owners on Suffern Main street claim that the mean speed
of automobiles traveling on their street is greater than the speed
limit of 35 miles per hour. A Random sample of 100 automobiles was
surveyed by a police radar operator. The sample yields a mean speed
of 36 miles per hour and a standard deviation of 4 miles per hour..
Is there enough evidence to support the claim at α = 0.05 (use a
P-value)
•a)Identify the claim. Then...

In an advertisement, a pizza shop claims its mean delivery time
is 30 minutes. A consumer group believes that the mean delivery
time is greater than the pizza shop claims. A random sample of 41
delivery times has a mean of 31.5 minutes with standard deviation
of 3.5 minutes. Does this indicate at a 5% significance level that
the mean delivery time is longer than what the pizza shop
claims?
Step 1: State the null and alternative hypothesis.
Step 2:...

1.
(CO 7) A travel analyst claims that the mean room rates at a
three-star hotel in Chicago is greater than $152. In a random
sample of 36 three-star hotel rooms in Chicago, the mean room rate
is $163 with a standard deviation of $41. At α=0.10, what type of
test is this and can you support the analyst’s claim using the
p-value?
Claim is the alternative, fail to reject the null as p-value
(0.054) is less than alpha (0.10),...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 32 minutes ago

asked 33 minutes ago

asked 40 minutes ago

asked 47 minutes ago

asked 49 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago