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.
Georgiaâs Guidelines for leaving a child without adult supervision: 1  Children under 8 years old should never be left alone, even for short periods of time. 2  Children between the ages of 9 and 12, based on level of maturity, can be left home alone for brief periods of time. It is not recommended, however, that 13 year olds baby sit infants, small children and children that require special attention due to medical conditions. 2  Children 15 and older can be left home alone overnight, depending on the level of maturity of the child.