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 0.05 level of significance.
A) The new naptime routine significantly reduced crying time, t(24) = ?4.35, p <0.05.
B) The new naptime routine did not reduce crying time, t(24) = ?4.35, p < 0.05.
C) The new naptime routine did not reduce crying time, t(24) = 0.92, p > 0.05.
D) The new naptime routine significantly reduce crying time, t(24) = 0.92, p < 0.05.