A researcher was interested in knowing if preterm infants with late metabolic acidosis and preterm infants without the condition differ with respect to urine levels of a certain chemical.

The mean levels, standard deviations, and sample sizes for the two samples studied were as follows:

Sample n x s With condition 35 8.5 5.5 Without condition 40 4.8 3.6 What should the researcher conclude on the basis of these results? Let a ¼ :05.