Answer:
2
Step-by-step explanation:
Based on the information given the gap in the data is 2 reason been that if 0 has 3 dots, 1 has 1 dot, 3 has 4 dots, 4 has 7 dots and 5 has 6 dots while 2 has 0 dots which means that 0,1,3,4 and 5 all have dots excepts 2 which has 0 dots which simply indicate that the lack of dots that 2 has led to the gap or interval in the data which inturn means that the gap in the data can be found on 2 due to 0 dots or lack of dots.
Therefore the gap in the data is 2.