A) Mean - add numbers of animals, and then divide by the number of students.
numbers of animals =1*20+2*11+3*18+4*10+5*3 +6*18 = 259 number of students = 20+20+11+18+10+3+18 = 100 mean=numbers of animals /number of students = 259 / 100=2.59
b) median You can write 20 zeroes, 20 ones, 11 twos and so on. and the remove from left and right equal amount of number, when you get in the middle,it is going to be median <u>20 "0", 20 "1", 11 "2"</u>, <u>18 "3", 10 "4", 5 "3", 18 "6" </u> 51 place 51 place From the left 20+20+11=51 places 18+5+10+18=51 places We can see that no single middle number. In the middle is going to be two numbers 2 and 3, and divide them by 2. (2+3)/2=2.5 median
