Statistical Power. The Statistical Data Analysis tutorial page provides a good background for understanding the concept of statistical power. In very basic terms, statistical power is the likelihood of achieving statistical significance, when in fact the alternative hypothesis is true.
In 2001, the U.S. Census Bureau estimated that nearly 7 million school-age children are routinely left home alone. âDevelopmentally, children are generally ready to be home alone around the age of 12 or 13,â says Cherie Sage, State Director of Safe Kids Kansas.
What is the legal age for kids to stay home alone? There is no legal age for children to stay at home alone. Parents are advised to use their best judgment, keeping the child's maturity level and safety issues in mind. Younger children have a greater need for supervision and care than older children. Obviously, young children under age 10 should not be left without supervision at any time.