2. During the tutorials, students developed the following dummy variable trip ge

Question

2. During the tutorials, students developed the following dummy variable trip generation equation to estimate the daily number of trips undertaken by full-time tertiary students in South East Queensland: Trips = 1.38 + 0.841 x Fem Dum + 1.03 x ProbLicDum + 1.18 x FullLicDum (R2 = 0.0688) Where: Trips trips per person per day Fem Dum = 1 if person is female and 0 otherwise ProbLicDum = 1 if person has a probationary licence and 0 otherwise FullLicDum 1 if person has a full licence and 0 otherwise level. (a) Discuss the R statistic for this equation in terms of what it represents and the relevance of the value reported for modelling purposes. 3 marks] (b) Interpret the equation in terms of what it says about the travel patterns of full- time tertiary students in South East Queensland. [3 marks] (c) Use this equation to estimate the total number of trips per day undertaken by this year's CIVL3420 class of 226 students, of which approximately · 25% are female and 75% are male · 50% hold a full driver licence, 25% hold a probationary licence, 15% hold a learners permit and 10% do not have a driver licence 4 marks

Explanation / Answer

Answer 2 :

Trips= 1.38 + 0.841* (25 % of 226) + 1.03*(25 % of 226) + 1.18*(50% of 226)

= 1.38 + 0.841*56.5 + 1.03*56.5+1.18*113

=240.43

~ 241 trips per person per day.

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