A travel association reported the domestic airfare (in dollars) for business travel for the current year and the previous year. Below is a sample of 12 flights with their domestic airfares shown for both years.CurrentYearPreviousYear345303526463420474216206285275405432635585710650605545517547570508610580(a)Formulate the hypotheses and test for a significant increase in the mean domestic airfare for business travel for the one-year period.a) H0: ?d ≤ 0Ha: ?d > 0b) H0: ?d = 0Ha: ?d ≠ 0 c) H0: ?d < 0Ha: ?d = 0d) H0: ?d ≥ 0Ha: ?d < 0e) H0: ?d ≠ 0Ha: ?d = 0Calculate the test statistic. (Use current year airfare − previous year airfare. Round your answer to three decimal places.)answer: ______Calculate the p-value. (Round your answer to four decimal places.)p-value = answer _______Using a 0.05 level of significance, what is your conclusion?a) Do not reject H0. We cannot conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.b) Reject H0. We can conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period. c) Do not reject H0. We can conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.d) Reject H0. We cannot conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.(part b)What is the sample mean domestic airfare (in dollars) for business travel for each year?current $ _______previous $ _______(part c)What is the percentage change in mean airfare for the one-year period? (Round your answer to one decimal place.)answer : ______%

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Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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Question

A travel association reported the domestic airfare (in dollars) for business travel for the current year and the previous year. Below is a sample of 12 flights with their domestic airfares shown for both years.

Current Year	Previous Year
345	303
526	463
420	474
216	206
285	275
405	432
635	585
710	650
605	545
517	547
570	508
610	580

(a)

Formulate the hypotheses and test for a significant increase in the mean domestic airfare for business travel for the one-year period.

a) H₀: ?_d ≤ 0

H_a: ?_d > 0

b) H₀: ?_d = 0

H_a: ?_d ≠ 0

c) H₀: ?_d < 0

H_a: ?_d = 0

d) H₀: ?_d ≥ 0

H_a: ?_d < 0

e) H₀: ?_d ≠ 0

H_a: ?_d = 0

Calculate the test statistic. (Use current year airfare − previous year airfare. Round your answer to three decimal places.)

answer: ______

Calculate the p-value. (Round your answer to four decimal places.)

p-value = answer _______

Using a 0.05 level of significance, what is your conclusion?

a) Do not reject H₀. We cannot conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.

b) Reject H₀. We can conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.

c) Do not reject H₀. We can conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.

d) Reject H₀. We cannot conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period.

(part b)

What is the sample mean domestic airfare (in dollars) for business travel for each year?

current $ _______

previous $ _______

(part c)

What is the percentage change in mean airfare for the one-year period? (Round your answer to one decimal place.)

answer : ______%

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Current Year	Previous Year
345	303
526	463
420	474
216	206
285	275
405	432
635	585
710	650
605	545
517	547
570	508
610	580

Current Year	Previous Year
345	303
526	463
420	474
216	206
285	275
405	432
635	585
710	650
605	545
517	547
570	508
610	580

Current Year	Previous Year
345	303
526	463
420	474
216	206
285	275
405	432
635	585
710	650
605	545
517	547
570	508
610	580