Walking in the Airport, Part I Do people walk faster in

Chapter 11, Problem 9AYU

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Problem 9AYU

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Walking in the Airport, Part I Do people walk faster in the airport when they are departing (getting on a plane) or when they are arriving (getting off a plane)? Researcher Seth B. Young measured the walking speed of travelers in San Francisco International Airport and Cleveland Hopkins International Airport. His findings are summarized in the table.

Direction of Travels	Departure	Arrival
Mean speed (feet per minute)	260	269
Standard deviation (feet per minute)	53	34
Sample size	35	35

(a) Is this an observational study or a designed experiment? Why?

(b) Explain why it is reasonable to use Welch’s t-test.

(c) Do individuals walk at different speeds depending on whether they are departing or arriving at the α = 0.05 level of significance?

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QUESTION:

Problem 9AYU

Problem

Direction of Travels	Departure	Arrival
Mean speed (feet per minute)	260	269
Standard deviation (feet per minute)	53	34
Sample size	35	35

(a) Is this an observational study or a designed experiment? Why?

(b) Explain why it is reasonable to use Welch’s t-test.

(c) Do individuals walk at different speeds depending on whether they are departing or arriving at the α = 0.05 level of significance?

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Problem 9AYU

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We have Researcher Seth B. Young measured the walking speed of travelers in San Francisco International Airport and Cleveland Hopkins International Airport. His findings are summarized in the table.