1Regarding the ImPACT example how many athletes studied were

1)Regarding the ImPACT example, how many athletes studied were not in fact concussed?

2)Regarding the ImPACT example, how many athletes studied did the screening test fin to be concussed?

1)Regarding the Beck Inventory example, in what percentage of cases did the screening test make the right decision?

1) Regarding the Field Sobriety test example, what was the sensitivity when a cutoff of 4 was used?

2) Regarding the Field Sobriety test example, what would happen to the false positive rate if the cutoff was changed from 4 to 8?

Rule: Beyond a certain level on the ImPACT scale you are said to be concussed. Actual Status Athlete was, in reality, not concussed 59 Athlete was, in reality, concussed ImPACT Prediction Totals ImPACT said \"not concussed\" 13 72 ImPACT said \"concussed\" 7 59 Totals 72 138 Sensitivity and specificity of the ImPACTTest Battery for concussion in athletes.\" Archives of Clinical Neuropsychology, 2005

Solution

a) athletes studied were not in fact concussed is 66

b) athletes studied were in fact concussed 72

c) percentage of cases did the screening test make the right decision

That is beck said depressed and test also said depressed is correct decison

percentage of cases did the screening test make the right decision is 66/95