Do people walk faster in the airport when they are departing (getting on a plane) or do they walk faster when they are arriving (getting off a plane)? A reputable researcher measured the walking speed of random travelers in two International Airports. His findings are summarized in the table. Complete parts (a)-(c) below. EEE Click the icon to view the findings. O A. This is an observational study since the researcher influenced the data Walking Speed O B. This is a designed experiment since the researcher influenced the data. O C. This is a designed experiment since the researcher did not influence the data. Direction of Travel Departure 251 Arrival O D. This is an observational study since the researcher did not influence the data. Mean speed (feet per minute) Standard deviation (feet per minute) Sample size 274 (b) Explain why it is reasonable to use Welch's t-test. 45 38 O A. The populations are normally distributed. O B. The samples are random, large and independent 35 35 O C. The samples are random, small and independent O D. The samples are random, large and dependent Print Done (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a 0.1 level of significance? Let p represent the mean speed of people departing and H2 represent the mean speed of people arriving. State the null and alternative hypothesis. A. Ho H12 H 2 O B. Ho H2 H 2 O D. Ho Hi H2 O C. Ho H2 Determine the P-value for this hypothesis test P-value= 0.000 (Round to three decimal places as needed.) Choose the correct conclusion. O A. Reject H. There is not sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O B. Do not reject H. There is not sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O C. Do not reject Hn. There is sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O D. Reject Ho. There is sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing.

Do people walk faster in the airport when they are departing (getting on a plane) or do they walk faster when they are arriving (getting off a plane)? A reputable researcher measured the walking speed of random travelers in two International Airports. His findings are summarized in the table. Complete parts (a)-(c) below. EEE Click the icon to view the findings. O A. This is an observational study since the researcher influenced the data Walking Speed O B. This is a designed experiment since the researcher influenced the data. O C. This is a designed experiment since the researcher did not influence the data. Direction of Travel Departure 251 Arrival O D. This is an observational study since the researcher did not influence the data. Mean speed (feet per minute) Standard deviation (feet per minute) Sample size 274 (b) Explain why it is reasonable to use Welch's t-test. 45 38 O A. The populations are normally distributed. O B. The samples are random, large and independent 35 35 O C. The samples are random, small and independent O D. The samples are random, large and dependent Print Done (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a 0.1 level of significance? Let p represent the mean speed of people departing and H2 represent the mean speed of people arriving. State the null and alternative hypothesis. A. Ho H12 H 2 O B. Ho H2 H 2 O D. Ho Hi H2 O C. Ho H2 Determine the P-value for this hypothesis test P-value= 0.000 (Round to three decimal places as needed.) Choose the correct conclusion. O A. Reject H. There is not sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O B. Do not reject H. There is not sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O C. Do not reject Hn. There is sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O D. Reject Ho. There is sufficient evidence at the a 0.1 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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