Rich people sleep better than poor people

USA: A recent study has proved that people from lower incomes, ethnic minorities and women get less sleep when compared to the deep sleep hours of rich people. The conclusion put-forth by researchers is as per the surveys conducted on more than 270,000 students of public and private schools in America between 1991 and 2012. In the survey students were asked two questions of which the first was how often they used to sleep more than seven hours a night. Next was how often they used to sleep le...