4-19 Bus and subway ridership in Washington, D.C., dur- ing the summer months is believed to be heavily tied to the number of tourists visiting the city. During the past 12 years, the following data have been obtained: YEAR 1 2 3 4 5 6 7 8 9 10 11 12 NUMBER OF TOURISTS (1,000,000s) 7 2 6 4 14 15 16 12 14 20 15 7 RIDERSHIP (100,000s) 15 10 13 15 25 27 24 20 27 44 34 17 (a) Plot these data and determine whether a linear model is reasonable. (b) Develop a regression model. (c) What is expected ridership if 10 million tourists visit the city? (d) If there are no tourists at all, explain the pre- dicted ridership. 3 3

4-19 Bus and subway ridership in Washington, D.C., dur- ing the summer months is believed to be heavily tied to the number of tourists visiting the city. During the past 12 years, the following data have been obtained: YEAR 1 2 3 4 5 6 7 8 9 10 11 12 NUMBER OF TOURISTS (1,000,000s) 7 2 6 4 14 15 16 12 14 20 15 7 RIDERSHIP (100,000s) 15 10 13 15 25 27 24 20 27 44 34 17 (a) Plot these data and determine whether a linear model is reasonable. (b) Develop a regression model. (c) What is expected ridership if 10 million tourists visit the city? (d) If there are no tourists at all, explain the pre- dicted ridership. 3 3

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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