Homework: Ch 11 HW: IWo Sample Procedure Question 12, 11.3.9-T Part40f5 HW score: 7882%, 13.4 Of 17 points Points: 0.6 ot 1 Save 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? This is a designed experiment since the researcher did not influence the data. This is an observational study since the researcher did not Influence the data. This is an observational study since the researcher influenced the data. This is a designed experiment since the researcher influenced the data. (b) Explain why it is reasonable to use Welch's t-test The samples are random, small and independent. The samples are random, large and independent. The populations are normally distributed. The samples are random, large and dependent. State the null and alternative hypothesis. HI 41 < P2 Determine the P-value for this hypothesis test P-value = (Round to three decimal places as needed.) Walking speed Direction of Travel Mean speed (feet per minute) Standard deviation (feet per minute) Sample size print Departure 48 35 Arrival 273 38 36 Done (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a = 0.06 level of significance? Let g, represent the mean speed of people departing and represent the mean speed of people arriving. HO : VLI < P2 HI 41 > P2