Answered: Mileage of Leased Chevrolet Impalas (n…

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

Topic Video

Question

a) Is the dealer's mean significantly greater than the national average of 30,043 miles for 2-year leases? Using the 10 percent level of significance, choose the appropriate hypothesis.

H₀: μ ≤ 30,043 miles vs. H₁: μ > 30,043 miles, reject H₀ if t_calc > 1.3250
H₀: μ ≥ 30,043 miles vs. H₁: μ > 30,043 miles, reject H₀ if t_calc > 1.3250
H₀: μ ≤ 30,043 miles vs. H₁: μ < 30,043 miles, reject H₀ if t_calc > 1.3250
H₁: μ ≤ 30,043 miles vs. H₀: μ > 30,043 miles, reject H₀ if t_calc > 1.3250

(b) Calculate the test statistic. (Round your answer to 2 decimal places.)

Test statistic ________

(c) The dealer's cars show a significantly greater mean number of miles than the national average at the 10 percent level.

Mileage of Leased Chevrolet Impalas (n = 21)
Mileage
40,016
Data in block format:
44,520
40,016
24,914
14,312
17,335
44,738
20,204
35,856
24,914
33,325
24,275
41,734
58,374
25,771
28,959
14,312
31,897
25,052
43,389
23,981
43,541
53,690
36,795
17,335
44,738
44,520
20,204
33,325
24,275
41,734
58,374
35,856
25,771
28,959
25,052
43,389
23,981
43,541
53,690
31,897
36,795

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

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Means$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions