Determining the standard deviation, Basic Statistics

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Determining the standard deviation

According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .4 hours and that the probability distribution is normal.

What is the probability that a randomly selected person sleeps more than 8 hours (to 4 decimals)?

What is the probability that a randomly selected person sleeps 6 hours or less (to 4 decimals)?

Doctors suggest getting between 7 and 9 hours of sleep each night. What percentage of the population gets this much sleep (to 1 decimal)?

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Basic Statistics: Determining the standard deviation

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Basic Statistics: Determining the standard deviation

Reference No:- TGS0721438

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Recent Questions Asked Basic Statistics

Q : What is the heat rejection for the condenser

Q : What is the wave speed and frequency

Q : Average number of fatal crashes

Q : Prepare a schedule showing the sales revenue

Q : Determining the standard deviation

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Request for Solution File

Ask an Expert for Answer!!

Basic Statistics: Determining the standard deviation

Reference No:- TGS0721438

Recent Questions Asked Basic Statistics

Q : What is the heat rejection for the condenser

Q : What is the wave speed and frequency

Q : Average number of fatal crashes

Q : Prepare a schedule showing the sales revenue

Q : Determining the standard deviation

Q : Write an expression for velocity as a function of time

Q : Calculate resistance to heat transfer for unit area

Q : What is the initial charge on each object

Q : What interest rate is charged on long- term debt

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