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. (a) Is this an observational study or a designed experiment? Why? A. This is an observational study since the researcher influenced the data. B. This is a designed experiment since the researcher influenced the data. C. This is an observational study since the researcher did not influence the data. D. This is a designed experiment since the researcher did not influence the data. (b)Explain why it is reasonable to use Welch's t-test. A.The samples are random, small and independent. B.The populations are normally distributed. C.The samples are random, large and independent. (c)The samples are random, large and dependent. P-value=____? (Round to three decimal places as needed.) (D)Choose the correct conclusion. A.Reject H0. There is sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. B. Reject H0. There is not sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. C. Do not reject H0. There is not sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. D. Do not reject H0. There is sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing.
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. (a) Is this an observational study or a designed experiment? Why? A. This is an observational study since the researcher influenced the data. B. This is a designed experiment since the researcher influenced the data. C. This is an observational study since the researcher did not influence the data. D. This is a designed experiment since the researcher did not influence the data. (b)Explain why it is reasonable to use Welch's t-test. A.The samples are random, small and independent. B.The populations are normally distributed. C.The samples are random, large and independent. (c)The samples are random, large and dependent. P-value=____? (Round to three decimal places as needed.) (D)Choose the correct conclusion. A.Reject H0. There is sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. B. Reject H0. There is not sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. C. Do not reject H0. There is not sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing. D. Do not reject H0. There is sufficient evidence at the α=0.05 level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing.
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 8E: List the sample space of each experiment. Picking a one-digit number
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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.
(a) Is this an observational study or a designed experiment? Why?
(b)Explain why it is reasonable to use Welch's t-test.
A.The samples are random, small and independent.
P-value=____?
(Round to three decimal places as needed.)(D)Choose the correct conclusion.
level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing.
level of significance to say that travelers walk at different speeds depending on whether they are arriving or departing.
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