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. EER Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? O A. This is an observational study since the researcher influenced the data X 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. O D. This is an observational study since the researcher did not influence the data Direction of Travel Mean speed (feet per minute) Standard deviation (feet per minute) Sample size Departure Arrival 251 274 (b) Explain why it is reasonable to use Welch's t-test 45 38 O A. The populations are normally distributed. 35 35 O B. The samples are random, large and independent O C. The samples are random, small and independent. Print Done O D. The samples are random, large and dependent. Click to select vour answer(s)
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. EER Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? O A. This is an observational study since the researcher influenced the data X 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. O D. This is an observational study since the researcher did not influence the data Direction of Travel Mean speed (feet per minute) Standard deviation (feet per minute) Sample size Departure Arrival 251 274 (b) Explain why it is reasonable to use Welch's t-test 45 38 O A. The populations are normally distributed. 35 35 O B. The samples are random, large and independent O C. The samples are random, small and independent. Print Done O D. The samples are random, large and dependent. Click to select vour answer(s)
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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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)? 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.
EER Click the icon to view the findings.
(a) Is this an observational study or a designed experiment? Why?
O A. This is an observational study since the researcher influenced the data
X
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.
O D. This is an observational study since the researcher did not influence the data
Direction of Travel
Mean speed
(feet per minute)
Standard deviation
(feet per minute)
Sample size
Departure
Arrival
251
274
(b) Explain why it is reasonable to use Welch's t-test
45
38
O A. The populations are normally distributed.
35
35
O B. The samples are random, large and independent
O C. The samples are random, small and independent.
Print
Done
O D. The samples are random, large and dependent.
Click to select vour answer(s)
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