Answered: Mileage of Leased Chevrolet Impalas (n…

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.6: Permutations And Combinations

Problem 37E

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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

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