There are three children in a room, ages three, four, and five. If a four-year-old child enters the room the

Question

(a) mean age will stay the same but the variance will increase.
(b) mean age will stay the same but the variance will decrease.
(c) mean age and variance will stay the same.
(d) mean age and variance will increase.
(e) mean age and variance will decrease.

Anonymous · Answer

Mean age will stay the same but the variance will decrease.

There are three children in a room, ages three, four, and five. If a four-year-old child enters the room the

1 Answer