Notation

I have a very basic question about the notation: is there are reason the notes write E[X] instead of E(X)? I appreciate that square brackets and round brackets make a difference for intervals (a square bracket indicates that the endpoint is included in the set and a round bracket that it is not), but what is the difference for functions?

 

OK, thanks a lot, John.

 

In the Standard Keyboard Notation, I didn't find a notation for "not equal to". Is it OK to use "<>" in the exam?

 

Yes, any sensible notation is acceptable.

 

OK thanks, Julie.