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 $\alpha$ = 0.05,what is the critical t value?
A)-2.365
B)$\pm$1.96
C)$\pm$2.365
D)$\pm$2.447
E)-2.447

Question

Quizplus · Accepted Answer

For a two-tailed test with a sample size of 7 (degrees of freedom = 6) and α = 0.05, the critical t value is approximately ±2.447.

The Mean Weight of Newborn Infants at a Community Hospital α\alphaα

The Mean Weight of Newborn Infants at a Community Hospital $\alpha$