value #1 is 1.0 0.3,

value #2 is 0.5 0.3,

value #3 is 1.5 0.5.

Which measurements are consistent with one another?

What is the probability of getting value #3, assuming value #2 is correct? What is the probability of getting value #2, assuming value #3 is correct? (You can assume Gaussian statistics, with each error corresponding to the 1- r.m.s.)