3. according to the pew research center 62% of all american adults have a family member who
has served in the military. we would like to see if this percentage is representative of american
adults who live in contra costa county.
a. suppose we collected a random sample of 100 american adults who live in contra costa
county, what would be the standard error associated with this sample?
b. suppose that from our sample of 100 american adults from contra costa county 54 of the
adults have a family member who has served in the military. is 54% an unusual result for a
random sample of 100 people when sampling from a population that has 62% who have a
family member who has served in the military?
c. what is the probability that a random sample of 100 american adults will have 54% or even
fewer, who have a family member serving in the military? be sure you specify how the
conditions have been met.