Final answer:
The median of the sequence 222, 235, 244, 253, 276, 311, 363 is the middle value after arranging them in order, which is 253.
Step-by-step explanation:
To find the median of the given set of numbers, first, list them in ascending order, which in this case, they already are: 222, 235, 244, 253, 276, 311, 363.
Since there are seven numbers, the median is the middle number, after arranging them in order, which is the fourth number in this sequence.
The median for the given set of numbers 222, 235, 244, 253, 276, 311, 363 is therefore 253, as it is the number that appears in the middle of the list.