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.
Idaho. Home alone age: none. No law for leaving child in car. Illinois. Home alone age: A minor must be at least fourteen years old to stay home alone. Full law here. Car law: No child that is six years of age or younger may be left in a car for longer than ten minutes, unless he or she is under the supervision of a person fourteen years of age or older.