The Mean Weight of Newborn Infants at a Community Hospital

Multiple Choice

The mean weight of newborn infants at a community hospital is 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) ±2.15
E) -2.447