Question 10 (1 point) The dependent variable in a regression is number of minutes each patient at the ER of a medical institution waits before being taken for medical evaluation and care. There are several potential explanatory variables and a constant in the regression. The set of explanatory variables includes "Bristol" which is a dummy variable equal to 1 for patients visiting the Bristol hospital and a value of O otherwise. The set of explanatory variables also includes "Kingsport" which also is a dummy variable equal to 1 for patients visiting the Kingsport hospital and a value of 0 otherwise. The control for the "Bristol" and "Kingsport" dummies is "Johnson City". Suppose that the coefficient multiplying "Bristol" is 12.3 with a p-value of 0.015. Test size is 5%. This result implies that on average after controlling for the effects of the other explanatory variables patients visiting the Bristol ER O A) wait 12.3 minutes longer than patients visiting the Johnson City ER. B) do not wait significantly longer than patients visiting the Johnson City ER. O C) wait 12.3 minutes longer than patients visiting either the Kingsport or Johnson City ER's. D) do not wait significantly longer than patients visiting either the Kingsport or Johnson City ER's