infections in childbirth:

center for cdc conducts a randomized trial in South Africa testing effectiveness of inexpensive wipes used during childbirth to prevent infection.

half of the mothers randomly assigned to have their birth canals wiped with drug chlorhexidine before giving birth and other half of women wiped with placebo

response variable is whether or not newborns develop infection

cdc hopes to find evidence that babies getting delivered by women with treated wipe are less likely to develop infection

a) parameters ? null and alternative hypothesis?

b)sample statistic?

c)if results are statistically significant what would this imply about the wipes and infection?