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.
Georgia, Maryland, and two others have a law stating that no child under 8 years old should be left alone at home and further controls the age for babysitting duties. According to LatchkeyâKids, Iowa has no age requirement for leaving a child at home alone.