(MULTIPLE CHOICE): 1- In regression another name for the independent variable is a- the regressor variable. b- the predictor variable. c- both (a) and (b). d- neither (a) nor (b). (1 pts) 2- A probabilistic model is a determanistic model plus random error. a- TRUE b- FALSE (1 pts) 3- A simple linear regression line estimates
Prothrombin time (PT) and activated partial thromboplastin time (APTT) are tests that evaluate the release of specific clotting factors by measuring the time it takes for a clot to form after certain reagents are added to a blood sample.
By Mayo Clinic Staff. Print. A prothrombin time test measures how quickly your blood clots. Sometimes called a PT or pro time test, a prothrombin time test uses a sample of your blood. Prothrombin is a protein produced by your liver. It is one of many factors in your blood that help it to clot appropriately. If you take a blood-thinning medication such as warfarin (Coumadin), your prothrombin time test results will be expressed as a ratio called the international normalized ratio (INR).