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Normal Distribution - Amount of Sleep

Application of normal distribution in analyzing sleep data.

David Brown
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Statistical ConceptsName: __________________________1180215Normal Distribution-Amount of SleepDo wehumans get enoughamount of sleep we need?Here is what some experts are saying..."There is increasing evidence that there is a very strong relationship between sleep quality andphysical and mentalhealth..."Anational survey of 31,044 adults revealed a link betweeninsomnia and other sleeping problems with high blood pressure, heart failure, anxiety, anddepression.Experts saythat there is no evidence yet to indicate that acquiring more sleep willimprove medical conditions,but some studieshave shown that more sleep makes teenagers dobetter in school.The US National Sleep Foundation suggeststhat an adult needsseven to nine hours of sleep anight.The Foundation conducted a survey in 2012 that suggestedabout75% of Americans hadsleepingproblems, with one-third being so sleepy during the day that it affected their lives andactivities.On the other hand,when asked if everyone needed 8 hours of sleep each night,some expertsstated: "It's nonsense. It's like saying everybody should have size eight shoes, orshould wearMedium size clothes...However, there isa normal distribution with the average sleep lengthseven and a quarter hours."Many people reporttheirsleepinghoursmore or less than theaverage, and that the determining factor for a required amount of sleep should bewhether theperson feelsfresh and alert during the day, the same experts say.Whileamount or quality ofsleep undergoes a wide variety ofchangesduring the human lifespan (based primarily upon ageand life style), all aspects of sleep, at any given age, have arelatively normal, bell-shaped distribution.

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Statistics

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