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.
No legal age for leaving children home alone. Thereâs no one law in Australia that says at what age you can or canât leave your child home alone. In Queensland if you leave a child under 12 years of age for an âunreasonable timeâ without supervision you have committed a misdemeanour. However, the legislation also says that whether the time is unreasonable depends on all the relevant circumstances.