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(civl261)[2009](s)quiz8a~PPSpider^_10072[1]

# (civl261)[2009](s)quiz8a~PPSpider^_10072[1] - CIVL 261...

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CIVL 261 Traffic and Transportation Engineering Tutorial 8A Quiz Name: Student ID: Week 9, 3 April 2009 Question 1: Consider the following trip attraction models estimated using a standard computing package. The t values are given in parentheses (assume that all the t values are larger then the critical value 1.645 for a 95% significant level on a one-tailed test, i.e. all the three equations pass the t-test) 2 1 123.2 0.89 0.900 (5.2) (7.3) Y X R = + = 2 2 3 4 40.1 0.14 +0.61X +0.25X 0.925 (6.4) (1.9) (2.4) (1.8) Y X R = + = 2 1 4 1.7 2.57 -1.78X 0.9996 (-0.6) (9.9) (-9.3) Y X R = − + = Y are work trips attracted to the zone 1 X is the total employment in the zone 2 X is industrial employment in the zone 3 X is the commercial employment in the zone 4 X is service employment Choose the most appropriate model, explaining clearly why, considering all its pros and cons Discussions 1. Good explanatory power of base year travel behavior should be achieved by the equation, i.e. the explanatory variables must be highly correlated with the dependent variable. Actually, the R 2 of all the three equations are more than 0.9 with a good explanatory power (goodness of fit)

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(civl261)[2009](s)quiz8a~PPSpider^_10072[1] - CIVL 261...

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