Which of the following studies demonstrates the importance of double-blind studies? rosenthal’s "maze bright" or "maze dull" rat study feingold's meta-analysis of research with attractive people dion, berscheid, & walster's study on the halo effect of physical attractiveness asch's study of using words to create a halo effect

A. Rosenthal's maze bright and maze dull rat study  

Explanation:

Rosenthal's maze bright and maze dull rat study was a famous study that he conducted by Fode in 1963. They have chosen two groups of rat and these rats are categorized in the bright maze and dull maze. Even all rats were a standard lab rat and do not breed in one way or another. The result of the study revealed that the students were unconsciously impressed by the performance of the rat to fit the expected result between the maze bright and maze dull rats. Thus Rosenthal would rationalize that the same effect would occur with teachers and students. The study was conducted by the great pygmalion effects or Rosenthal effects that is the concepts that explain the performance by people when greater expectation is put on them

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; generalizability;