yassine chaouche

It would be nice to show how to go from 99.8% to the 500:1 ratio.

Would that mean that the strength of evidence is the TP/FP ratio ? in that case, it would have the same definition as the relative likelihood. Wouldn't there be a better definition for either one of the notions so that we can easily differentiate them ?

How did it convert to 3/7th is unclear.

Is this the same question as : what is the probablity that the test gives correct results ? We can also ask 3 other questions :

• What is the probability of a student with a black tongue depressor do not have Diseasitis ?
• What is the probability of a student witiout a black tongue depressor have Diseasitis ?
• What is the probability of a student witiout a black tongue depressor do not have Diseasitis ?

Another interesting question to ask is what is the single probablity of the tongue depressor to give accurate results ?

If we know that the tongue depressor has a 5% error on all students, sicks and non sicks, we can predict that the probability of being sick is (another rule here ? or another fashion of using the rule if applicable)