A Ph.D., or Doctor of Philosophy, is among the highest of degree levels and is sometimes considered the most difficult to complete because it requires candidates to write and defend a dissertation, take courses and pass several tests. It typically takes 5-6 years to fulfill the requirements needed for a Ph.D.tudents must first take advanced courses in their field for a few years, followed by a set of comprehensive exams. After this is accomplished, Ph.D. students produce a dissertation project, which can vary in its time to completion.
Children at least ten (10) years of age and not more than twelve (12) years of age shall be allowed to stay home alone for brief periods of time, but not after 9:00 pm. Children over twelve (12) years of age may be left home alone, but not overnight.
in illinois parents can leave their children home alone at the age of 14 in maryland the age is eight there are no laws on the books in new jersey as to what age a child can be left home alone but safe kids worldwide recommends that no child under the age of 12 be left home alone