Speed data collected on an urban roadway yielded a standard deviation in speeds of 4.8 mi/h. (a) If an engineer wishes to estimate the average speed on the roadway at a 95% confidence level so that the estimate is within ±2 mi/h of the true average, how many spot speeds should be collected? No. of spot speed data for ±2 mi/h tolerance 22.13 4 (b) If the estimate of the average must be within ±1 mi/h, what should the sample size be? No. of spot speed data ±1 mi/h tolerance 88.51
Speed data collected on an urban roadway yielded a standard deviation in speeds of 4.8 mi/h. (a) If an engineer wishes to estimate the average speed on the roadway at a 95% confidence level so that the estimate is within ±2 mi/h of the true average, how many spot speeds should be collected? No. of spot speed data for ±2 mi/h tolerance 22.13 4 (b) If the estimate of the average must be within ±1 mi/h, what should the sample size be? No. of spot speed data ±1 mi/h tolerance 88.51
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Milan
![Speed data collected on an urban roadway yielded a standard deviation
in speeds of 4.8 mi/h.
(a) If an engineer wishes to estimate the average speed on the roadway
at a 95% confidence level
so that the estimate is within ±2 mi/h of the true average, how many spot
speeds should be
collected?
No. of spot speed data for ±2 mi/h
tolerance
22.13
A
(b) If the estimate of the average must be within ±1 mi/h, what should the
sample size be?
No. of spot speed data ±1 mi/h
tolerance
88.51](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F432126f5-c0ee-4b45-b65f-fbf8817dd920%2F7621a77a-e0cc-48b3-92e9-2d9a16091e79%2Ffgnh2ni_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Speed data collected on an urban roadway yielded a standard deviation
in speeds of 4.8 mi/h.
(a) If an engineer wishes to estimate the average speed on the roadway
at a 95% confidence level
so that the estimate is within ±2 mi/h of the true average, how many spot
speeds should be
collected?
No. of spot speed data for ±2 mi/h
tolerance
22.13
A
(b) If the estimate of the average must be within ±1 mi/h, what should the
sample size be?
No. of spot speed data ±1 mi/h
tolerance
88.51
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