Question

a study was made to find if the distance people lived from where they worked was affected by whether or not they had college degrees. it was found that without a college degree, a person traveled an average distance of 12.3 mi to work. with a college degree, a person traveled an average distance of 24.2 mi to work. are the results practically significant? why or why not?
a. no, because the difference between 24.2 mi and 12.3 mi is not large.

b. no, because the distance for those with a degree is almost twice that of those who do not.

c. yes, because the distance for those with a degree is almost twice that of those who do not.

d. yes, because it is unlikely for the results to occur again.

Explanation:

Practical significance depends on real - world impact. The distance for college - degree holders (24.2 mi) is almost twice that of non - degree holders (12.3 mi, since \(24.2\approx2\times12.3\)). This large relative difference has practical meaning (e.g., in commuting costs, time). Option A is wrong as the difference is large. Option B's reasoning is contradictory (twice the distance should be significant). Option D is about statistical significance, not practical.

Answer:

C. Yes, because the distance for those with a degree is almost twice that of those who do not.