I have the following collection of data
$13,13,14,17,17,17,20,999$. I've calculated the mean, median and mode and am asked which measure of centre does not work well here (either of the 3 or none at all).
Now I can see that the mean is not a good measure here because of the $999$. But the median and mode are both $17$ which does seem to represent the centre well? I'm just confused as to whether the mean is the only thing that doesn't work well, or do none of them work well?