Remein and Wilkerson (1961; Journal of Chronic Diseases 13, 6-21) applied the Folin-Wu blood test for diabetes one hour after a test meal to 580 outpatients of the Boston City Hospital being seen for reasons other than suspected diabetes. The following table gives the frequencies of postive and negative tests for the study subjects:

Disease Status

Test Result	Diabetic	Nondiabetic	Total
Positive	56	49	105
Negative	14	461	475
Total	70	510	580

(a) (6pts) Estimate the specicity of the Folin-Wu blood test.

(b) (6pts)Compute the standard error of the estimated specicity.

(c) (6pts) Compute the 95% condence interval for specicity.