1) determine the median of the following datasets:
a {3,5,1,0,-2,5,6,5}
b {0.5,0.7, 1.5, 0.4, 0.3]
explain too how you got the answer : )

Median means "middle". When finding the median, think of finding the middle number(s). In set A, there is an even amount of numbers, so there is no exact middle number, but there are two numbers in the middle- which are 0 and -2. You get to zero and two by counting how many numbers there are, and if it is even, pick the two numbers in the middle. If there is an odd amount, you pick the one number in the middle- like in the next problem. Simply count to the number in the middle by making sure there is an even amount of numbers on bith sides, which will lead you to a median of 1.5. See how there's 2 numbers on both sides of 1.5? That lets you know that you found the correct median because both sides have the same amount of numbers left over, not an uneven amount.

Median-Most important thing is to write the numbers in least to greatest and find the middle number. If there isn't a middle number and is between two numbers:
        1,2,3,4,5,6 it is between 3 and 4
So you have to add 3 and 4 and divide it by 2. 3+4=7 and 7/2=3.5 median is 3.5

A=4
B=0.5