Specific design ideas explored by wolfgang weingart and his students in the late 1960s and early 1970s and adopted a decade later include letter-spaced, sans-serif type; bold, stair-stepped rules; diagonal type; the introduction of italic type and/or weight changes within words; and type reversed from a series of bars.

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

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 !