Question

Statistics has two main functions: Description and Inference. What does it mean when we say "Description to Inference: A Transition?"

And, what statistical areas must inference use?

Answer 1

You might find something here:

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Sra

Answer 2

You have knowledge of particular variables, which is description. From this knowledge, you can make predictions, which is inference. Various tests of probability would be used.

I hope this helps a little more. Thanks for asking.