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.
Legal age for kids home alone. Some states have laws governing what age you can legally leave them home, ranging from age 8 all the way to age 14. Check out the list here to see the specific laws in your state. Most states, however, do not have laws, leaving the decision up to the parent.ome 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 nine.