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Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 11.3 - Problem 10
Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 11.3 - Problem 10

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# ?Walking in the Airport, Part II Do business travelers walk at a different pace than leisure travelers? Researcher Seth B. Young measured the walking s

ISBN: 9780134133539 240

## Solution for problem 10 Chapter 11.3

Statistics: Informed Decisions Using Data | 5th Edition

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Problem 10

Walking in the Airport, Part II Do business travelers walk at a different pace than leisure travelers? Researcher Seth B. Young measured the walking speed of business and leisure travelers in San Francisco International Airport and Cleveland Hopkins International Airport. His findings are summarized in the table.

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

(b) What must be true regarding the populations to use Welch’s t-test to compare the means?

(c) Assuming that the requirements listed in part (b) are satisfied, determine whether business travelers walk at a different speed from leisure travelers at the  = 0.05 level of significance.

Step-by-Step Solution:

Step 1 of 5) Walking in the Airport, Part II Do business travelers walk at a different pace than leisure travelers Researcher Seth B. Young measured the walking speed of business and leisure travelers in San Francisco International Airport and Cleveland Hopkins International Airport. His findings are summarized in the table. (a) Is this an observational study or a designed experiment Why (b) What must be true regarding the populations to use Welch’s t-test to compare the means (c) Assuming that the requirements listed in part (b) are satisfied, determine whether business travelers walk at a different speed from leisure travelers at the = 0.05 level of significance. Because we assume that the null hypothesis is true, until we have evidence to the contrary, we let m2 - m1 = 0 in the computation of the test statistic. The question now becomes “What distribution does this test statistic follow”

Step 2 of 2

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?Walking in the Airport, Part II Do business travelers walk at a different pace than leisure travelers? Researcher Seth B. Young measured the walking s