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 did not influence the data. O B. This is an observational study since the researcher influenced the data. OC. This is a designed experiment since the researcher influenced the data. D. This is an observational study since the researcher did not influence the data. (b) Explain why it is reasonable to use Welch's t-test. O A. The samples are random, large and dependent. O B. The samples are random, small and independent. C. The samples are random, large and independent. O D. The populations are normally distributed. (c) Do individuals walk at different speeds depending on whether they are departing or arriving at the a = 0.05 level of significance? Let p represent the mean speed of people departing and p2 represent the mean speed of people arriving. State the null and alternative hypothesis. OA Ho H1H2 B. Ho H1 #2 OD. Ho H1 H2 OC. Ho H1 =H2 H: 2

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

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