Rothenberg et al. (2004) investigated the effectiveness of using the Hologic Sahara Sonometer, a portable device that measures bone mineral density (BMD) in the ankle, in predicting a fracture. They used a Hologic estimated bone mineral density value of .57 as a cutoff. The results yielded the following data:
Fracture Present (D) No Fracture Present (~D) Total BMD = 0.57 (T) 217 667 884 BMD > 0.57 (~T) 70 333 403 Total 287 1000 1287
a. Compute the Sensitivity of the test.
b. Compute the Specificity of the test.
c. Compute the Positive Predictive Value