means is the same thing as average
median means the number that is in the middle when ou order them from least to greatest
mode is the number that appears most often
range is the difference between the biggest and smallest number
so let's say we have the numbers
3,1,3,5,3
mean is (3+1+3+5+3)/5=15/5=3
mean is 3
median
arrange in least to greatest
1,3,3,3,5
middle number is 3
median is 3
mode
most often seen numbers
it's 3
mode is 3
range is difference of highest and lowest number
1 and 5
5-1=4
range=4