It is said that the average weight of healthy 12-hour-old infants is supposed to be 7.5 lb. A sample of newborn babies from a low-income neighborhood yielded the following weights (in pounds) at 12...

It is said that the average weight of healthy 12-hour-old infants is supposed to be 7.5 lb. A sample of newborn babies from a low-income neighborhood yielded the following weights (in pounds) at 12 hours after birth:

6.0 8.2 6.4 4.8

8.6 8.0 6.0

7.5 8.1 7.2

At the 0.01 significance level, can we conclude that babies from this neighborhood are underweight?