Sensitivity measures how often a test correctly generates a positive result for people who have the condition that’s being tested for.
Sensitivity analysis is a method for predicting the outcome of a decision if a situation turns out to be different compared to the key predictions.
Formula to calculate sensitivity.
![How to Calculate Sensitivity.](https://www.learntocalculate.com/wp-content/uploads/2020/08/sensitivity-1024x184.png)
Example:
Suppose in a Covid 19 sample survey there was 2,000 positive test, the total true positive tests were 1,800 and 400 false negatives. Calculate the sensitivity.
![How to Calculate Sensitivity.](https://www.learntocalculate.com/wp-content/uploads/2020/08/sensitivity-2.png)
Therefore, the sensitivity of the survey was 90.9%.