What is the average night sleep?

7.5. 5-9 hours usually people get. It is good if get rem sleep - the time when you dream.
6-9hrs. Newborn to 2 months old 12 - 18 hrs 3 months to 1 year old 14 - 15 hrs 1 to 3 years old 12 - 14 hrs 3 to 5 years old 11 - 13 hrs 5 to 12 years old 10 - 11 hrs 12 to 18 years old 8.5 - 10 hrs adults (18+) 6 - 9 hrs.