Billy, laurie, and robert found the mass of the same piece of metal. each student measured the mass of the metal 3 times. there was no change to the metal between measurements. the results for each student are listed below.
students' mass data

student billie laurie robert
trial 1 3 g 5 g 6 g
trial 2 2 g 5 g 8 g
trial 1 10g 5 g 4 g

which student's results can be trusted more?
a.
laurie
b.
they are the same.
c.
billy
d.
robert