A scientist, conducting a research study on sleep and learning, questions her own objectivity and decides to let a third person, not associated with conducting the experiment, score the tests. The scientist is probably trying to eliminate .

experimenter bias

Explanation:

The scientist try to eliminate experimenter bias because in  experimenter bias experimenter influence the outcomes of participants by giving cues to obtained expected results. Such experiments are biased because  in this participants view and response controlled sub-consciously to meet the expected outcomes of experimenter.

answer; the correct answer is (d) binge eating followed by compensatory behavior;

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 !