What is #2 and I need help with 3 and the ones that were in the picture please help me this is so hard.

Answer:
I only have the answer to the medians
Step-by-step explanation:
#2: 26
#3: 357.5
For #2: you put all the numbers in order then find the one in the middle
12,19,24,26,34,38,53 26 is in the middle
For #3: you put the numbers in order and find the one in the middle
250,298,346,369,422,433 ... in this case we have two in the middle: 346 and 369 so all you have to do is find their mean and you will have the right answer:
346+369=715 715/2= 357.5