1st you will have to research different dog weights and put them in the chart. after this you arrange the data least from greatest to find the median(ehich is when you find the middle of the data so take you fingers from the least number and the greatest number and go inward until they land on the same number and that numbers your median...if there is 2 numbers as a median add them up and decide by 2 and then that's your median) to find your mode just see what number occurs a lot so if there is 5 3s and 8 4s then 4 would be your mode because there is more 4s then 3s....then to find your mean add all the numbers up and then divided by how many numbers there are and that is your mean...the last part you. have to answer after you so all this
hope I helped!