Independent and Identically Distributed

This is a very common assumption we have.

Independent means Independence (Statistics). Identically distributed means they both follow the same distribution.

Independent?	Identically Distributed?	Example
Yes	Yes	Two coins are flopped. X = 1 if heads and 0 if tails on the first flip, Y = ” ” on the 2nd flip
Yes	No	X = flip a coin (H), Y = take a card (Ace)
No	Yes	A fair coin is tossed twice. X = # heads, Y = 2 -X, so Y represents the # tails
No	No	A fair coin is tossed 3 times. X = # heads, Y = abs(# heads - # tails)