what is the precession and recall
Question
What is the precession and recall explain in detail practical scenerio
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Machine Learning
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Answer ( 1 )
Imagine that your Girlfriend gave you you a birthday surprise every year for last 10 years ..one day your girlfriend asks you baby do you remember all the birthday surprises from me ..
to stay on good terms with your girlfriend you need to recall all the 10 events from your memory ..
Therefore recall is the ratio of the number of events you can correctly recall to the total number of events
If you recall all 10 events correctly your recall is 100%
2.precession:
Lets Assume that you took 15 Guesses out of which 10 were correct, and 5 were wrong .This means you can recall all events but not so precisely
Therefore precision is the ratio of a number of events you can correctly recall to the total number of events you can recall(Mix correct and Wrong recall)
From the above Example precision will be 66.67%