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 illinois parents can leave their children home alone at the age of 14 in maryland the age is eight there are no laws on the books in new jersey as to what age a child can be left home alone but safe kids worldwide recommends that no child under the age of 12 be left home alone