Answer: 3.5
Step-by-step explanation: First, let's put the data set from least to greatest....
1, 1, (3, 4,) 6, 7
The median is the middle number in the data, since it's an even number we will have to do an extra step...
3 + 4 = 7
7 ÷ 2 = 3.5
The median is 3.5, I hope this helps!