What are simple and understandable books on theory and matstat?

Question

Books

At the institute, I knew and understood something in these subjects. Now almost everything is forgotten. Please advise books that will help me to resurrect the lost knowledge. Preferably, those where everything is stated in a simple and understandable language.

Answer 1

Terver Wentzel. This is if it is simple and for non-mathematicians. For mathematicians, I don't know.

Answer 2

Sevastyanov B. A., “Course of Probability Theory and Mathematical Statistics”, - M .: Nauka, 1982.

Answer 3

There are two books by Chernova N.I., they favorably differ from the rest in completeness of presentation and examples, simplicity, the only thing is that they contain mathematics in fair quantities.