12. Fill in the chart below. Label the 4 squares with either true positive, false positive, true negative, or false negative. Disease No Disease Screening Test + True Positive False Positive Screening Test - False Negative True Negative b. What is the sensitivity of the PSA test? A + (A + C) = 9 + (9+3) =0.75 C. What is the specificity of the PSA test? D + (B + D) = 72 + (72 + 16) = 0.81 d. What is the negative predictive value? D + (C+ D) = 72 + (3 +72) = 0.96 e. What is the positive predictive value? A + (A + B) = 9 + (9 + 16) = 0.36 f. How many false positives were there? g. If another random sample - this time of 300 men -- were screened for prostate cancer, how many false positives would you expect