Getting Started Bb Discussions -(Fall202 . High-end Designer GI_. @ Your Shopping Cart ) Business Registration - @ State-by state guide 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 a designed experiment since the researche Course Home nce the data. O B. This is an observational study since the researcher influenced the data. C. This is an observational study since the researcher did not influence the data. O D. This is a designed experiment since the researcher influenced the data (b) Explain why it is reasonable to use Welch's t-test. -X Walking speed A. The samples are random, large and independen O B. The populations are normally distributed. Direction of Travel Departure Arrival O C. The samples are random, small and independent Mean speed 256 269 O D. The samples are random, large and dependent. (feet per minute) Standard deviation 53 34 (c) Do individuals walk at different speeds depending on (feet per minute) H, represent the mean speed of people departing and u, represent the mean speed of people arriving. Sample size 35 35 State the null and alternative hypothesis. YA. Ho: H1 = H2 Print Done O C. Ho: H1