Most 78-year-old women do well with 7–8 hours of sleep each night, with a healthy range of 7–9 hours if they wake up feeling rested.

A 77-year-old woman usually needs about 7 to 8 hours of nightly sleep, adjusted for health, daily activity, and how rested she feels.

A typical 69-year-old woman usually needs about 7 to 8 hours of good-quality sleep each night to stay alert and healthy.

Most 68-year-old women need about 7–8 hours of quality sleep each night, with small adjustments based on health, medications, and daily routine.

Most 67-year-old women do best with about 7 to 8 hours of quality sleep each night, adjusted for health, energy, and daily routine.

Most 71-year-old women sleep best with 7–8 hours at night, backed by medical sleep guidelines for older adults.

Most 6-year-olds need 9 to 12 hours of total daily sleep, with many doing best around 10 or 11 hours each night.

Most 85-year-olds sleep best with about 7 to 8 hours a night, with small personal variation and good quality rest mattering more than exact time.

Most 4-year-olds need 10 to 13 hours of sleep in 24 hours, including any nap, to stay rested, grow well, and handle busy days.

Most 12-year-olds do best with 9–12 hours of sleep each night, with around 10–11 hours working well for many kids.