CASE STUDY 27.8 NURSING MOMS CAN EXERCISE, TOO

CASE STUDY 27.8
NURSING MOMS CAN EXERCISE, TOO
For Questions , use the following narrative
Narrative: Case study 27.8 summary
Moderate aerobic exercise has no adverse effects on the quantity or quality of breast milk produced by nursing mothers, and can significantly improve the mothers' cardiovascular fitness, researchers say.The study monitored 33 women for 12 weeks, beginning 6-8 weeks after the births of their children.All were exclusively breast-feeding their babies, and had not previously been exercising.18 women were randomly assigned to the exercise group and 15 to the non-exercise group.The women in the exercise group participated in individual exercise programs, including rapid walking, jogging or bicycling for 45 minutes per day, five days per week.The researchers found that: 1) women in both groups experienced the same amount of weight loss; 2) there was an important improvement in the aerobic fitness of the exercising mothers; and 3) there was no significant difference between the groups in terms of infant breast-milk intake, energy output in the milk, or infant weight gain.

-{Case study 27.8 narrative} Suppose the results had been based on 330 women (180 in the exercise group and 150 in the non-exercise group) rather than 33 women.How would the p-values have changed, given that the reported sample means remained the same?

A) The p-values for the sample of 330 would have been larger than the p-values for the sample of 33.
B) The p-values for the sample of 330 would have been smaller than the p-values for the sample of 33.
C) The p-values for the significant results would have been smaller for the sample of 330 (compared to the sample of 33) , while the p-values for the non-significant results would have been larger for the sample of 330 (compared to the sample of 33) .
D) The p-values would not have changed.