A confidence interval for the independent variable X would specify ________.
A) the uncertainty about the mean value of the dependent variable
B) the possible values of X that are uncorrelated with the dependent variable
C) all the possible values of X
D) the probability distribution for the various values of X
Question 2
You are interested in examining the factors that determine the average length of stay by patients in hospitals across states.
You collect data on the following variables:Y = statewide average hospital stayX1 = median state incomeX2 = 1 if the state is in the Northeast, 0 otherwiseX3 = 1 if the state is in the South, 0 otherwiseX4 = 1 the state is in the Midwest, 0 otherwiseX5 = 1 the state is in the West, 0 otherwiseBased on the data above, you run the following regression: Y = 0 + 1X1 + 2X2 + 3X3 + 4X4.Identify the length of stay for each of the four regions using the population slopes.
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