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.
According to FindLaw, children under 7 should never be left alone. Children 8 to 10 years of age can be left home alone for up to an hour and a half, but only during daylight or early evening hours. Children ages 11 to 12 can be left home alone for up to 3 hours. Teens over 16 can be left home alone overnight.