A Major Airline Is Concerned That the Waiting Time for Customers

question 56

Multiple Choice

A major airline is concerned that the waiting time for customers at its ticket counter may be exceeding its target average of 190 seconds. To test this, the company has selected a random sample of 100 customers and times them from when the customer first arrives at the checkout line until he or she is at the counter being served by the ticket agent. The mean time for this sample was 202 seconds with a standard deviation of 28 seconds. Given this information and the desire to conduct the test using an alpha level of 0.02, which of the following statements is true?

• A) The chance of a Type II error is 1 - 0.02 = 0.98.
• B) The test to be conducted will be structured as a two-tailed test.
• C) The test statistic will be approximately t = 4.286, so the null hypothesis should be rejected.
• D) The sample data indicate that the difference between the sample mean and the hypothesized population mean should be attributed only to sampling error.

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Definitions:

Autonomic Fibres

Nerve fibers that are part of the autonomic nervous system, controlling involuntary bodily functions such as heart rate and digestion.

Sympathetic Fibres

Nerve fibers of the sympathetic nervous system that are involved in the body's fight or flight response, affecting functions such as heart rate and blood pressure.

Afferent Nervous System

Part of the peripheral nervous system that carries sensory information from the sensory organs to the brain.

Efferent Nervous System

Part of the nervous system responsible for carrying signals away from the central nervous system towards muscles to cause movement.