Elementary Surveying (14th Edition)
Elementary Surveying (14th Edition)
14th Edition
ISBN: 9780133758887
Author: Charles D. Ghilani, Paul R. Wolf
Publisher: PEARSON
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Chapter 9, Problem 9.12P
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Three pipes of length 800 m, 500 m, and 400 m and diameters of 500 mm, 400 mm, and 300 mm, respectively, are connected in a series. These pipes are to be replaced by a single pipe of length 1700 m. Find the diameter of the single pipe.
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The following data is representative of that reported in an article on nitrogen emissions, with x = burner area liberation rate (MBtu/hr-ft²) and y = NOx emission rate (ppm): x 100 125 125 150 150 200 200 250 250 300 300 350 400 400 140 150 180 210 180 310 270 400 420 430 400 600 600 660 (a) Assuming that the simple linear regression model is valid, obtain the least squares estimate of the true regression line. (Round all numerical values to four decimal places.) y = (b) What is the estimate of expected NOx emission rate when burner area liberation rate equals 245? (Round your answer to two decimal places.) ppm (c) Estimate the amount by which you expect NO emission rate to change when burner area liberation rate is decreased by 50. (Round your answer to two decimal places.) ppm (d) Would you use the estimated regression line to predict emission rate for a liberation rate of 500? Why or why not? Yes, the data is perfectly linear, thus lending to accurate predictions. Yes, this value is…
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