They separated these children into two groups, those who reported playing no video games at all and those who reported playing video games for three hours per d

They separated these children into two groups, those who reported playing no video games at all and those who reported playing video games for three hours per day or more. So what happened to the 50% of total children that were somewhere between 0 and 3 hours per days of games? Were they discarded or rounded into one those two groups, because that leaves a huge gap in the middle?