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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. E Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? O A. This is a designed experiment since the researcher influenced the data. O B. This is an observational study since the researcher influenced the data. Arrival 266 OC. This is a designed experiment since the researcher did not influence the data. O D. This is an observational study since the researcher did not influence the data. Direction of Travel Departure Mean speed (feet per minute) Standard deviation 261 54 34 (b) Explain why it is reasonable to use Welch's t-test. (feet per minute) Sample size 35 35 O A. The samples are random, large and independent. O B. The populations are normally distributed. OC. The samples are random, large and dependent. O D. The samples are random, small and independent. (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a = 0.01 level of significance? Let u, represent the mean speed of people departing and u, represent the mean speed of people arriving. State the null and alternative hypothesis. O A. Ho: H1 H2 O B. Ho: H1 =P2 OC. Ho: H1 = H2 OD. Ho: H = H2 H,: H > H2 bocic toct

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. E Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? O A. This is a designed experiment since the researcher influenced the data. O B. This is an observational study since the researcher influenced the data. Arrival 266 OC. This is a designed experiment since the researcher did not influence the data. O D. This is an observational study since the researcher did not influence the data. Direction of Travel Departure Mean speed (feet per minute) Standard deviation 261 54 34 (b) Explain why it is reasonable to use Welch's t-test. (feet per minute) Sample size 35 35 O A. The samples are random, large and independent. O B. The populations are normally distributed. OC. The samples are random, large and dependent. O D. The samples are random, small and independent. (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a = 0.01 level of significance? Let u, represent the mean speed of people departing and u, represent the mean speed of people arriving. State the null and alternative hypothesis. O A. Ho: H1 H2 O B. Ho: H1 =P2 OC. Ho: H1 = H2 OD. Ho: H = H2 H,: H > H2 bocic toct

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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)? Areputable researcher measured the walking speed of random travelers in two International Airports. His findings are summarized in the table. Complete parts (a)-(c) below. E Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? O A. This is a designed experiment since the researcher influenced the data. O B. This is an observational study since the researcher influenced the data. OC. This is a designed experiment since the researcher did not influence the data. Direction of Travel Departure Mean speed (feet per minute) Standard deviation Arrival 261 266 O D. This is an observational study since the researcher did not influence the data. 54 34 (feet per minute) Sample size (b) Explain why it is reasonable to use Welch's t-test. 35 35 O A. The samples are random, large and independent. O B. The populations are normally distributed. O C. The samples are random, large and dependent. O D. The samples are random, small and independent. (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a = 0.01 level of significance? Let u, represent the mean speed of people departing and u, represent the mean speed of people arriving State the null and alternative hypothesis. O B. Ho: H1 =42 H,: H <H2 O A. Ho: H1 <HZ O D. Ho: H1 = H2 H,: H > H2 OC. Ho: H1 = H2 Determine the P-value for this hypothesis test. P-value = (Round to three decimal places as needed.) %3D Choose the correct conclusion. O A. Reject Hn. There is sufficient evidence at the a = 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O B. Do not reject Hn. There is sufficient evidence at the a= 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. OC. Reject Hn. There is not sufficient evidence at the a= 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O D. Do not reject Hn. There is not sufficient evidence at the a = 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. CiICK tO seiect your answer S). 9:36 AM 12/21/2020
Transcribed Image Text: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)? Areputable researcher measured the walking speed of random travelers in two International Airports. His findings are summarized in the table. Complete parts (a)-(c) below. E Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? O A. This is a designed experiment since the researcher influenced the data. O B. This is an observational study since the researcher influenced the data. OC. This is a designed experiment since the researcher did not influence the data. Direction of Travel Departure Mean speed (feet per minute) Standard deviation Arrival 261 266 O D. This is an observational study since the researcher did not influence the data. 54 34 (feet per minute) Sample size (b) Explain why it is reasonable to use Welch's t-test. 35 35 O A. The samples are random, large and independent. O B. The populations are normally distributed. O C. The samples are random, large and dependent. O D. The samples are random, small and independent. (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a = 0.01 level of significance? Let u, represent the mean speed of people departing and u, represent the mean speed of people arriving State the null and alternative hypothesis. O B. Ho: H1 =42 H,: H <H2 O A. Ho: H1 <HZ O D. Ho: H1 = H2 H,: H > H2 OC. Ho: H1 = H2 Determine the P-value for this hypothesis test. P-value = (Round to three decimal places as needed.) %3D Choose the correct conclusion. O A. Reject Hn. There is sufficient evidence at the a = 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O B. Do not reject Hn. There is sufficient evidence at the a= 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. OC. Reject Hn. There is not sufficient evidence at the a= 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. O D. Do not reject Hn. There is not sufficient evidence at the a = 0.01 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. CiICK tO seiect your answer S). 9:36 AM 12/21/2020
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