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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)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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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)
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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