eBook Video (Exercise 12.9) A Bloomberg BusinessWeek subscriber study asked, \"I

Question

eBook Video (Exercise 12.9) A Bloomberg BusinessWeek subscriber study asked, "In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?" A second question asked if the type of flight was domestic or international travel. Sample data obtained are shown in the following table. Excel File: data12-09.xls Type of Flight Type of Tieket Firt Class Business Class Economy Clhss Domestie 29 95 518 International 121 135 a. Using a.o5 level of significance, is the type of ticket purchased independent of the type of flight What is your conclusioh? Conclude that the type of ticket purchased is Independent of the type of filight b. Discuss any dependence that exists between the type of ticket and type of might The input in the box below will not be graded, but may be reviewed and considered by your instructor. blank Check My Work (1 remainin

Explanation / Answer

chi-square - test of independence

a)

No , as p-value << 0.05

b)

we conclude that type of ticket purchased is dependent on type of flight

c1 c2 c3 sum r1 29 95 518 642 r2 22 121 135 278 sum 51 216 653 920 Eij 1 2 3 expected 1 35.58913 150.7304 455.6804 2 15.41087 65.26957 197.3196 0i 29 95 518 22 121 135 Ei 35.58913 150.7304 455.6804 15.41087 65.26957 197.31957 sum (Oi-Ei)^2/Ei 1.219941 20.60554 8.522921 2.817274 47.58545 19.682428 100.4335 critical value 5.991465 p-value 1.55E-22

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