Question # 1
Rothenberg et al. (2004) investigated the effectivenessof using the Hologic Sahara Sonometer, a portable device thatmeasures bone mineral density (BMD) in the ankle, in predicting afracture. They used a Hologic estimated bone mineral density valueof
.57 as a cutoff. The results yielded the followingdata:
| 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. (6points)
b. Compute the Specificity of the test. (6points)
c. Compute the Positive Predictive Value (6points)
Question # 2
According to the most recent Davenport student profile,28% of students are male. Given a sample of 15students:
a. Find the probability that none are male. (6points)
b. Find the probability that 10 are male. (6points)
c. Find the probability that at least six are male. (6points)
