A Test Is Conducted in 22 Cities to See If

question 40

Multiple Choice

A test is conducted in 22 cities to see if giving away free transit system maps will increase the number of bus riders.In a regression analysis,the dependent variable Y is the increase in bus riders (in thousands of persons) from the start of the test until its conclusion.The independent variables are X1 = the number (in thousands) of free maps distributed and a binary variable X2 = 1 if the city has free downtown parking,0 otherwise.The estimated regression equation is Y = 1.32 + 0.0345X1 − 1.45X2.In city 3,the observed Y value is 7.3,X1 = 140,and X2 = 0.The residual for city 3 (in thousands) is

• A)6.15
• B)1.15
• C)4.83
• D)1.57

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