According to a leasing firm's reports, the mean number of miles driven annually in its leased cars is 12,940 miles with a standard deviation of 2920 miles. The company recently starting using new contracts which require customers to have the cars serviced at their own expense. The company's owner believes the mean number of miles driven annually under the new contracts, P, is less than 12,940 miles. He takes a random sample of 50 cars under the new contracts. The cars in the sample had mean of 12,340 annual miles driven. Is there support for the claim, at the 0.05 level of significance, that the population mean number of miles driven annually by cars under the new contracts, is less than 12,940 miles? Assume that the population standard deviation of miles driven annually was not affected by the change to the contracts. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H₁. Ho :O H₁ :O (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) three or more decimal places.) H |x 4 DSC X O S 2 Do OSO Р ô S 00 020 DO Españe ?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

And question e is can you support the claim that the population mean number of miles driven annually by cars under the new contracts is less than 12,940. Yes or no?

O
According to a leasing firm's reports, the mean number of miles driven annually in its leased cars is 12,940 miles with a standard deviation of 2920 miles. The
company recently starting using new contracts which require customers to have the cars serviced at their own expense. The company's owner believes the mean
number of miles driven annually under the new contracts, H, is less than 12,940 miles. He takes a random sample of 50 cars under the new contracts. The cars
in the sample had a mean of 12,340 annual miles driven. Is there support for the claim, at the 0.05 level of significance, that the population mean number of
miles driven annually by cars under the new contracts, is less than 12,940 miles? Assume that the population standard deviation of miles driven annually was
not affected by the change to the contracts.
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.)
(a) State the null hypothesis Ho and the alternative hypothesis H₁.
Ho :O
H, :O
(b) Determine the type of test statistic to use.
(Choose one) ▼
(c) Find the value of the test statistic. (Round to three or more decimal places.)
0
(d) Find the p-value. (Round to three or more decimal places.)
0
Continue
C
M
%
3
X
=O
S
0 0 3
X
O P
&
S
OSO
O<O
ô
020
S
>O
Submit Assignment
2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility
*
O
España
?
圖

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

Expert Solution