The numbers of students in the 7 schools in a district are given below.
(Note that these are already ordered from least to greatest.)
171, 275, 278, 321, 331, 364, 367
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Suppose that the number 171 from this list changes to 269. Answer the following.
(a) What happens to the median?
It decreases by
.
It increases by
.
It stays the same.
(b) What happens to the mean?
It decreases by
.
It increases by
.
It stays the same.
