(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.
To test your bodyâs blood clotting abilities, your doctor will collect a sample of your blood in a vial and add chemicals. The test measures how many seconds it takes for your blood to clot after the addition of the chemicals. This test is sometimes known as an activated partial thromboplastin time (APTT) test. Your doctor may order a PTT test to investigate the cause of prolonged or excessive bleeding. Symptoms that may prompt your doctor to order this test include: 1  frequent or heavy nosebleeds.  heavy or prolonged menstrual periods.