The Mean Crying Time of Infants During Naptime at a Local

question 70

Multiple Choice

The mean crying time of infants during naptime at a local preschool is 12 min.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) min.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) = 8.67, p > .05.
• D) The new naptime routine significantly reduced crying time, t(24) = 8.67, p < .05.

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