A New Gamma Camera/computer System That Uses a New Method

A new gamma camera/computer system that uses a new method of calculating cardiac ejection fraction (EF) is installed in a nuclear medicine department.The department decides to calculate EF for the next 25 patients on both the old gamma camera and the new gamma camera before discontinuing the use of the old camera.In the future, if it is desirable to convert the new EF value to that which would have been obtained on the old gamma camera (e.g., to assess if the patient's EF had changed) , the mathematical analysis to be used is called a(n)

A) independent t-test.
B) linear regression.
C) standard error.
D) chi-square.