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.
Common sense tells us most 13-year olds are perfectly capable of staying home alone after school while their parent is at work, but in Illinois, common sense isnât the law. Any parents who leave their children age 13 or younger home alone may be guilty of neglect under Illinois state law.