817 Math Blog

mean

• arrange data in ascending orders


• the sum of data of all data


• not as accurate to find the average when there is an outlier

1,2,3,4,5

1+2+3+4+5=15

median

• order the set of data in an ascending order to find the middle number


• it's the middle number


• if the middle number add them and then divide them by 2


• good to use when outlier

1,2,3,4,5

15/5=3 the median number is 3

mode

• the data that appears the most


• arrange in ascending order


• you can have to mode

1,1,1,1,1,1,3

1 is the mode

range

• arrange the data in ascending order


• subtract the smallest data from the largest data

1,2,3,4,5

1-5=4

This is the video I found about mean, median, mode and range.