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Are Flights Cheaper When Scheduled Earlier? Listed below

Chapter 9, Problem 4 RE

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QUESTION:

Problem  4 RE

 

Are Flights Cheaper When Scheduled Earlier? Listed below are the costs (in dollars) of flights from New York (JFK) to San Francisco for US Air, Continental, Delta, United, American, Alaska Airlines, and Northwest. Use a 0.01 significance level to test the claim that flights scheduled one day in advance cost more than flights scheduled 30 days in advance. What strategy appears to be effective in saving money when flying?

Flight scheduled one day in advance

456

614

628

1088

943

567

536

Flight scheduled 30 days in advance

244

260

264

264

278

318

280

Questions & Answers

QUESTION:

Problem  4 RE

 

Are Flights Cheaper When Scheduled Earlier? Listed below are the costs (in dollars) of flights from New York (JFK) to San Francisco for US Air, Continental, Delta, United, American, Alaska Airlines, and Northwest. Use a 0.01 significance level to test the claim that flights scheduled one day in advance cost more than flights scheduled 30 days in advance. What strategy appears to be effective in saving money when flying?

Flight scheduled one day in advance

456

614

628

1088

943

567

536

Flight scheduled 30 days in advance

244

260

264

264

278

318

280

ANSWER:

Answer: 

Step1 of 4:

               The given data listed below are the costs (in dollars) of flights from New York (JFK) to San Francisco for US Air, Continental, Delta, United, American, Alaska Airlines, and Northwest. 

 

           

Flight scheduled one day in advance            (

 Flight scheduled 30 days in advance

          (

Difference

d = -

456

244

212

614

260

354

628

264

364

1088

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