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.
home alone at age 8 or 9 after taking into account their child s maturity many parents think you can leave kids home alone for short periods of time starting at age eight or ninehildren ages ten to twelve can stay by themselves for up to an hour as long as there is ready back up such as a neighbor next door tweens can stay home for about two hours but there should be someone checking in with them either by phone or in person a friend popping in