Mathematics

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7 October, 09:37

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.