Only 3% of people are single parents. Nearly everyone reading about a percentage of single parents would assume that it is out of a percentage of parents. Including adults who don't have children in there as well as actual children is stat mangling of the highest order.
The actual % of single parents is more like 25% by any sensible metric.
But that's not an example of a statistic that is wrong, your complaint is that it is not a "good" statistic. Which is quite a different matter.
I found that the easiest one to get right, because I read the question and it had to be the smallest number by far.
I didn't get the number of twitter users right... or the child poverty one. I went for 20%