if a constant out put results from different inputs it is called what

Question

i dont know what he means 

Answer 1

In economics it is called constant return to scale. Increase or decrease in input would result the same change in input. Your question is a little vague, and this answer might satisfy you completely. 

 

What can it be in statistics? What you have in statistics as an input is basically data. If you get the same constant output once you change input, this would mean that the Statistic (not statistics) you are using is sufficient. This answer is not complete as well since the question is not well specified.

If you forget about other subjects, in mathematics this is just dealing with a homogeneous function, and in particular, your question is about a homogeneous function of degree 0.