Student or Learner
Is there any possibility to say " Statistics shows" ? For example:
Statistics shows that people are having fewer children these days! ( I would say "show" )
Alone, no. In that sentence, you are correct and it should be "show."
But as part of a longer sentence (e.g., "A quick review of the statistics shows that..."), it would be correct.
(There is no need for an exclamation point.)
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.