Question

Which may not exist for a list of data?

median

mean

mode

median and mode

Answer 1

mode

Answer 2

mode: value that occurs most often,
if there isn't a value that repeats itself then you can't have a mode.

Answer 3

median: center value of the data set in order.
if the number of values you have is an even number then the median would have to be the average of the 2 center values

Answer 4

mean: average of all of the values
or sum of the values divided by the number of values