When the expectations of one person bring about the expected behavior in another person, the expectation has become a(n)

Self-fulfilling prophecy            

Explanation:

Self-fulfilling prophecy: The term self-fulfilling prophecy was given by Merton and is defined as a "socio-psychological phenomenon" in which an individual expects or predicts about something and later on this expectation or prediction comes out to be true just because he or she believes it to happen and the outcome leads to fulfilling those beliefs.

Types:

1. Other-imposed prophecy.

2. Self-imposed prophecy.

In the question above, the statement signifies the self-fulfilling prophecy.

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 !

answer; belief perseverance;