Study on correlation between sleep patterns and grades

Professor Jeffrey Grossman facilitated an experiment in which 100 students in an MIT engineering class were given Fitbits in exchange for the researchers' access to a semester's worth of their activity data. The study started out as an attempt to find a correlation between physical exercise and academic performance--but, the researchers discovered that there was actually an obvious correlation between consistent amount of sleep before an exam, actual bedtimes, and the exam grades. While amount of sleep did matter, getting a good amount of sleep during the learning period and not just the night before an exam as well as getting to sleep before a certain time was crucial. 

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