In your own words.
What is the purpose of the Kirby Bauer test?

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.