The Mean Crying Time of Infants During Naptime at a Local

Multiple Choice

The mean crying time of infants during naptime at a local preschool is 12 minutes.The school implements a new naptime routine in a sample of 25 infants and records an average crying time of 8±4.6 (M±SD) minutes.Test whether this new naptime routine reduced crying time at a .05 level of significance.

A) The new naptime routine significantly reduced crying time,t(24) = -4.35,p < .05.
B) The new naptime routine did not reduce crying time,t(24) = -4.35,p < .05.
C) The new naptime routine did not reduce crying time,t(24) = 0.92,p > .05.
D) The new naptime routine significantly reduce crying time,t(24) = 0.92,p < .05.