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.
In a few states, laws govern that question. But not in Oklahoma or in Texas. Neither Oklahoma law nor state Department of Human Services policies specify at what age a child can stay home alone or baby-sit. However, DHS has some guidelines. If a child is left home alone at age 6 or younger, parents could be charged with neglect, depending on the circumstances, said Mary Leaver, DHS agency spokeswoman. And in many circumstances, children older than 6 should not be left alone. But each case is examined individually.