Answer:
median = 3.5
Explanation:
the median is the middle value of the data sey. If there is no exact middle then it is the average of the values either side of the middle.
listing the values from the data set
1 , 1 , 2, 3 , 4 , 4 , 4 , 5
↑ middle
median = (3 + 4) ÷ 2 = 7 ÷ 2 = 3.5