amelia is conducing a survey among people who travel to work using public transportation system in her city , she wants how much time people spend using public transportation she selected three samples for her study ,

sample 1 : 12 random members of the population who drive to work

sample 2 : 12 random people who use public transportation to get to work

sample 3 : 12 random people who drive to work and take public transportation on alternate days
which sample is most likely to give a valid generalization ? which is least likely to give a valid generalization?

the sample that is most likely to give a valid generalization is
the sample that is least likely to give a valid generalization is