You know that every data point will fall between 0 and ten.
Theonly way a ditribution can have mean 0 and be restricted between
0 and ten is if all the probability is associated with 0. That is, every data point is 0.
If you get a trial with a non zero value, then it must be possible to get nonzero values. This implies that the mean is not zero. p-value = 0.000000000000!
Not a dumb question though.