Ahospital is auditing the work hours of its employees for the past year. if four names are drawn at random and compared to the entire company, what is the difference between the average 3rd quartile for the sample and the population based on the graph?

name minimum 1st quartile 2nd quartile 3rd quartile maximum
fred 18 24 26 47 52
susie 12 26 30 40 54
jc 17 27 34 43 48
roberta 15 21 32 45 55
population 6 30 37 50 60
a.
there is a difference of 8.25 hours.
b.
there is a difference of 6.25 hours.
c.
there is a difference of 4.25 hours.
d.
there is a difference of 12.25 hours.