CHECK YOUR UNDERSTANDING High intracranial pressure (inside the skull) typically is a result of an injury to the head and can be very dangerous. A screening test for high intracranial pressure was...

How many false positives were there among these 189 people? Explain the meaning of a false positive for the person tested.

Extracted text: CHECK YOUR UNDERSTANDING High intracranial pressure (inside the skull) typically is a result of an injury to the head and can be very dangerous. A screening test for high intracranial pressure was proposed many years ago, based on the data in the following observations. This simple and non-invasive test involves observing the retinal vein to see if it is pulsating. Pulsation is normal and so would be considered a negative test result. Pulsation Absent Pulsation Present Total (Positive Test) (Negative Test) High Intracranial Pressure (Condition Present) 43 43 Normal Intracranial Pressure 18 128 146 (Condition Absent) Total 61 128 189 Sources: B. E. Levin "The Clinical Significance of Spontaneous Pulsations of the Retinai Vein Archives of Neurolony Vol. 35, 1978 pp. 37-40, www.cebm.netindex aspxPor1042 US Pck BatyMeGrawI ...