Final answer:
The median number of emergency department visits reported for sports-related injuries for children and adolescents aged 18 and younger is 29.
Step-by-step explanation:
The task is to find the median number of emergency department visits reported for sports-related injuries for children and adolescents aged 18 and younger. The given numbers are 24, 28, 42, 26, 35, and 30. To find the median, we first need to arrange the numbers in ascending order: 24, 26, 28, 30, 35, 42. Since there are 6 numbers, the median will be the average of the middle two numbers, which in this case are 28 and 30. Adding them together and dividing by 2, we get a median of 29.