Yes, it might be.
In real life, the ratio of male birth and female birth would not be exactly even since there are factors that could be put in consideration (such as abortion and hereditary diseases)
If it conducted in a simple random sample, the ratio of male and female birth will pretty much even with 99% level of confidence.
I believe the answer is: Formal Operational Stage
During the Formal Operational Stage, people already developed the ability to form abstract thinking and <span> solving complex problems.
For average people, Formal operational stage started when we're around 12 years old of age and keep developing until our late adulthood.</span><span />
D....................................................................