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.
Currently, Kansas has no minimum age for marriage if the minor has parental or judicial approval. In the case of the Nebraska girl â a person must be at least 17 to marry in that state â the girl's mother gave permission for the couple to get married in Kansas last spring after learning that her daughter was pregnant.