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.
Most states, including Kansas, donât have regulations or laws about when a child is considered old enough to stay at home alone or babysit another child. Each year, more than 3 million kids ages 14 and under get hurt at home â and more than 2,000 children die from unintentional injuries in the home.