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Q2 Z2,(Q2) Z2(Q2) - Institute for Water Resources - U.S. Army

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TABLE 9<br />

TOWBOAT COST REGRESSION RESULTS<br />

• r 2 = .85<br />

Sample Size = 266<br />

Standard Error of Estimate = 0.14883<br />

Intercept =.-0.36759<br />

Variable Name Mean<br />

Kort Nozzles 0.60150<br />

Towboat Age<br />

1956 - 1960<br />

1951 - 1955<br />

Be<strong>for</strong>e 1950<br />

0.27820<br />

0.21053<br />

0.33835<br />

Regression<br />

Coefficient -<br />

-0.07181<br />

-0.03936<br />

0.01693<br />

0.06774<br />

t -Value<br />

-2.96398<br />

-0.92493<br />

0.44163<br />

1.98602<br />

River Districts 2<br />

, (percent ties m 10 ) .<br />

Chicago Port 0.08023 0.01841 0.25051<br />

Tennessee 0.00598 0.18884 . 0.46628<br />

West Intercostal Canal 0.02857 -0.16024 -1.63870<br />

East Intercostal Canal 0.00241 -1.21041 -1,45835<br />

Gulf of Mexico 0.01857 -0.07897 ' -0.83839<br />

Cairo to St. Louis , 0.06481 , -0..18085 -1.44655<br />

' St. Louis to Grafton 0.00402 0.82517 0.87359<br />

Cairo to Mouth of. Mississippi 0.18763 0.03639 0.57067<br />

Cincinnati to Cairo 0.04395 ' 0.06897 0.50527<br />

Dam 23 to Cincinnati 0.03207 0.17160 0.81126<br />

Pittsburgh to Dam 23 0.04797 6.00230 0.62480<br />

Port of Pittsburgh 0.00526 1.37323 0.69112<br />

St. Louis to Minnesota 0.07530 0.01127 0.15281 •<br />

Dam 23 to Cairo . 0.08252 -0.07361. -0.87499<br />

Kanawha River ' 0.00752 ' 0.04017 0.25541<br />

Monongahela 0.00421 0.35108 0.48631<br />

Missouri 0.00361 0.64024 1.09926<br />

Unit Tow Movement . 0.06177 0.23119 3.84230<br />

Kanawha to Monaca 0.04241 -0.20394 -0.67019<br />

Missouri to Ohic, to Tennessee 0.01410 0.23829 0.60023<br />

Company Dummy Variables<br />

Company 1<br />

Company 2<br />

Company 3<br />

Company 4<br />

Company 5<br />

log io Horsepower (tiles<br />

log io EBM (times 10- )<br />

Dependent Variable: log io Cost/EBM<br />

(times. 10 0) 0.19820<br />

•<br />

-4<br />

0.11654 -0.03766 • -062727<br />

0.19173 0.15438 3.80294<br />

0.02632 0.19398 2.91415<br />

0.18421 -0.00853 -0.19389<br />

• 0.01880 -0.3126 -0.81462<br />

-0.61664 -026136 -2.23274<br />

-0.73099 -0.53895 -19.21339<br />

76 '

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