The monthly rents (in dollars) paid by 10 people are given below. (Note that these are already ordered from least to greatest.)

820 , 955 , 980 , 1010 , 1020 , 1035 , 1050 , 1090 , 1115 , 1175

Suppose that one of the people moves. His rent changes from $820 to $970 .

Answer the following.

(a) What happens to the mean?
It decreases by $___
It increases by $___ OR
It stays the same

(b) What happens to the median?
It decreases by $ ___
It increases by $ ___ OR
It stays the same