State whether the following statements are True or False. Give reason in support of your answer:

(a) The value of sensitivity of the following results of a diagnostic test is 0.85. 

(b) For the following cohort study, the relative risk for the lung cancer among smokers is 3.5.

(c) The logit link function is log 
(d) We define three indicator/dummy variables for a regressor variable with three categories.
(e) Left censoring occurs whenever the exact time of occurrence of an event is not known.

(a) False. Sensitivity is the proportion of true positive results among those who have the disease. The sensitivity is calculated as \( \frac{{\text{True Positives}}}{{\text{True Positives + False Negatives}}} _______ __________ ____ _____ __________ ___ _________ ____ ___ ____ __________ _______.
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