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 $\alpha$ = 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

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 $\alpha$ = 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

Quizplus · Accepted Answer

The critical t value for a two-tailed test with a significance level of 0.05 and 6 degrees of freedom (n-1 = 7-1) 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 $\alpha$