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...

Help finding:

• (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? Let μ1
  represent the mean speed of people departing and
  
  μ2
  
  represent the mean speed of people arriving.

Extracted 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. Click the icon to view the findings. (a) Is this an observational study or a designed experiment? Why? A. This is an observational study since the researcher did not influence the data. B. This is a designed experiment since the researcher influenced the data. C. This is an observational study since the researcher influenced the data. D. This is a designed experiment since the researcher did not influence the data. Walking speed Direction of Travel Departure Arrival Mean speed (feet per minute) Standard deviation 261 270 51 35 (feet per minute) Sample size 35 35 Print Done