The National Sleep Foundation (2015) recommends 9 to 11 hours of sleep per night for children ages 6 to 13, but in a study of third- and fifth-graders (Buckhalt et al., 2009), children averaged __________ hours of sleep.

A. 12 to 13
B. 8 to 10
C. less than 7½
D. about 6


Answer: C

Psychology

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