o people walk faster in the airport when they are departing or when they are arriving? Researchers heasured the walking speed of 54 departing travelers and 75 arriving travelers at Sacramento International irport. They found that departing travelers had a mean walking speed of 274 ft/min, and arriving ravelers had a mean walking speed of 260 ft/min. The standard deviation was 34 ft/min for departing ravelers and 56 ft/min for arriving travelers. a. Construct a 89% confidence interval for the difference in mean walking speed between departing and arriving travelers. Round your answers to 3 decimals. Use the smallest of the two degrees of freedom. Critical value: 2 or t = Margin of Error: E = Confidence Interval: (Enter the positive one.) b. Interpret your result in part (a) in a complete sentence. li c. Based on your confidence interval, can you conclude that departing travelers walk at a different speed than arriving travlers? O Yes O No

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Do people walk faster in the airport when they are departing or when they are arriving? Researchers
measured the walking speed of 54 departing travelers and 75 arriving travelers at Sacramento International
Airport. They found that departing travelers had a mean walking speed of 274 ft/min, and arriving
travelers had a mean walking speed of 260 ft/min. The standard deviation was 34 ft/min for departing
travelers and 56 ft/min for arriving travelers.
a. Construct a 89% confidence interval for the difference in mean walking speed between departing and
arriving travelers. Round your answers to 3 decimals. Use the smallest of the two degrees of
freedom.
Critical value: 2* ort*
Margin of Error: E =
Confidence Interval: [
=
(Enter the positive one.)
O No
]
b. Interpret your result in part (a) in a complete sentence.
c. Based on your confidence interval, can you conclude that departing travelers walk at a different
speed than arriving travlers?
Yes
Transcribed Image Text:Do people walk faster in the airport when they are departing or when they are arriving? Researchers measured the walking speed of 54 departing travelers and 75 arriving travelers at Sacramento International Airport. They found that departing travelers had a mean walking speed of 274 ft/min, and arriving travelers had a mean walking speed of 260 ft/min. The standard deviation was 34 ft/min for departing travelers and 56 ft/min for arriving travelers. a. Construct a 89% confidence interval for the difference in mean walking speed between departing and arriving travelers. Round your answers to 3 decimals. Use the smallest of the two degrees of freedom. Critical value: 2* ort* Margin of Error: E = Confidence Interval: [ = (Enter the positive one.) O No ] b. Interpret your result in part (a) in a complete sentence. c. Based on your confidence interval, can you conclude that departing travelers walk at a different speed than arriving travlers? Yes
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