Question: REM sleep is the phase of sleep when most active dreaming occurs. In a study, the amount of REM sleep during the first four hours
REM sleep is the phase of sleep when most active dreaming occurs. In a study, the amount of REM sleep during the first four hours of sleep was described by a random variable T with probability density function
where t is measured in minutes.
(a) What is the probability that the amount of REM sleep is between 30 and 60 minutes?
(b) Find the mean amount of REM sleep.
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t 1600 a ft 20 1600 t 0 if 0 t 40 if 40 t 80 otherwise 60 40 t P30 T 60 ft dt I 1600 1600 900 320... View full answer
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