The Mean Weight of Newborn Infants at a Community Hospital

Multiple Choice

The mean weight of newborn infants at a community hospital is said to be 6.6 pounds. A sample of
Seven infants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8,
8) 4, and 6.6 pounds. If α = 0.05, what is the critical t value?

A) -2.365
B) ±1.96
C) ±2.365
D) ±2.447
E) -2.447