something

(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.