What is the difference between average and root mean squared?

[astral night]

What is the difference between average and root mean squared?

[formal rapids]

You mean this (a+b)/2>= sqrt(ab)

[steep path]

as much as i know, one is for small value & middle , other is usually used for bigger value , absolute magnitude & variance type shi-

honestly don't know much about root mean squared i usually see it in physics

like the max i can tell you about it is , it's used for variance calculation in a data set