How much sleep you get may depend on factors you cannot control. A new research study based on data from a sleep activity-monitoring app suggests that age, nationality, and gender may be some of the driving forces that determine how much sleep you get every night. “Most people in the data set schedule between seven and eight hours of sleep a night, with a mean of 7.88 hours. Of all the factors considered in their analysis, gender plays the biggest role in how long a person sleeps. On average, women schedule 8.07 hours of sleep, while men schedule 7.77 hours. Age also seems to be an important factor for when people sleep. On average, older people schedule sleep earlier than younger people. Nationality also plays a role in sleep duration. Residents of Singapore and Japan had the shortest sleep duration of the 20 countries represented in the study, getting an average of 7 hours and 24 minutes of shut-eye a night. People in the Netherlands were the most well-rested, averaging 8 hours and 12 minutes of sleep a night. In the United States, the average sleep duration is 7.87 hours.” This study raised more questions that need to be considered in further research