__(number of parts) + 1 __

2

-In this case, 5 'parts'. Add one, divide by two.

-count three items in to find the median.

-reorder the sequence from smallest to largest, making it: 2, 2.5, 2.75, 3, 3.75

Answer: 3rd item, 2.75

For mean you'll have to add them all together, then divide by five.