Suppose you have estimated two equations:

Equation A. Length of Stay = 3 + 0.1*Medicare

Equation B. Length of Stay = 2.8 + 0.4*Medicare

where Length of Stay is the number of days the patient spent in the hospital and Medicare is 1 if the patient's primary payer was Medicare and 0 otherwise.

Your test set contains only two patients, who are both Medicare beneficiaries and whose Length of Stay was 3 and 4 days respectively.

Using this test set, the root mean squared error for Equation A is _____ for Equation B.

Select one:

a. smaller than

b. the same as

c. larger than

d. impossible to compare to that