In a study of children injured in automobile crashed, those wearing seat belts had a mean stay of 0.83 days in an intensive care unit. Those not wearing seat belts had a mean stay of 1.39 days. The probability of this difference in means occurring by chance turns out to be less than 1 in 10,000. Answer each question with either yes or no.

Is this result significant at the 0.05 level?

At the 0.01 level?

Would it be reasonable to conclude that seatbelts reduce the severity of injuries?