Nacirema Airlines Is Buying a Fleet of New Fuel-Efficient Planes

question 49

Multiple Choice

Nacirema Airlines is buying a fleet of new fuel-efficient planes.The HogJet and the LitheJet both meet their price and performance needs,and both planes meet EPA noise guidelines.However,the quieter plane is preferred.Each plane is flown through a typical takeoff and landing sequence 10 times,while remote sensors at ground level record the noise levels (in decibels) .The table below summarizes the sound level tests using Excel's default level of significance (α = .05) . If we switched from α = 0.05 to α = 0.005 in a two-tailed test of means,our assumption about variances (assumed equal or assumed unequal) would

• A)affect the decision.
• B)not affect the decision.
• C)require a new analysis.

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Definitions:

Planning

The process of making plans for something, including setting goals, defining steps, and allocating resources to achieve those goals.

Diagnosis

The identification of the nature and cause of a disease or condition through examination of symptoms and often diagnostic tests.

Structure Evaluation

The process of assessing the arrangement, condition, or effectiveness of a physical or organizational structure.

Computer Password

A secret series of characters that enables a user to access a file, computer, or program.