A Research Laboratory Develops a New Serologic Test for Detecting

A research laboratory develops a new serologic test for detecting prostate cancer.  The new assay is compared to transrectal ultrasound-guided prostate biopsy to determine sensitivity and specificity parameters.  It is found that the test result is negative in 95% of patients who do not have the disease.  If the new assay is used on 8 blood samples taken from patients without prostate cancer, what is the probability of all 8 test results coming back negative?

A) 0.05 × 8
B) 0.95 × 8
C) 0.05⁸
D) 0.95⁸
E) 1 − 0.05⁸
F) 1 − 0.95⁸

Correct Answer:

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