A physical examination and an audiometric test were given to 500 persons with suspected hearing problems, of whom 300 were actually found to have them. The results of the examinations were as follows

1. Physical Exam 2. Audiometric Test

Result

Hearing Problem

Present Absent

Result

Hearing Problem

Present Absent

Positive

240 40

Positive

270 60

Negative

60 160

Negative

30 140

For each of the two exams, Define and calculate the followings:

The Sensitivity of this test

The specificity of the test

Predictive value positive

Predictive value negative

Compared to the physical exam, the audiometric test is:

A. Equally sensitive and specific

B. Less sensitive and less specific

C. less sensitive and more specific

D. more sensitive and less specific

E. more sensitive and more specific