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Inphants need 16 hours of sleep a day. Got info from http://www.babycenter.com/0_how-much-sleep-does-your-child-need_7645.bc
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need 12 to 14 hours of sleep a day according to http://www.sleepfoundation.org/article/how-sleep-works/how-much-sleep-do-we-really-need
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When your a young child 9 years old you need 10 hours of sleep a day according to http://www.sleepfoundation.org/article/how-sleep-works/how-much-sleep-do-we-really-need
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In your teen years you need about 8.5 to 9.25 hours of sleep i only get abot 7
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When your old you only need 6 to 7 hours of sleep according to wiki answeres.
