What might be a purpose of the mere exposure effect from an evolutionary perspective?

To avoid unfamiliar and possibly dangerous stimuli.

Explanation:

The mere exposure effect is a psychological phenomenon by which we usually reveal an inclination for things simply because they are known to us. It refers to a situation in which a certain stimulus has been available to a subject’s perception, either consciously or subconsciously.

It was first proven by the Polish-born psychologist Robert Zajonc, who performed a seminal experiment in 1968.

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !

depends.

explanation: