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math
you got 8 hours of sleep on monday night and 7 hours of sleep on tuesday night on wednesday you only got 4 hours of sleep because you were up late working on an english paper on thursday and friday you got 9 hours of sleep each
asked by Cheyenne on August 29, 2007 
statistics
researchers believe a new sleep on average 10 hours per night ( µ = 10), with a population standard deviation of 2.3 hours(s=2.3) it is assume that the number of hours of sleep per night is normal distributed , however you think
asked by jessica on June 13, 2011 
statistics
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours aday? b) In a
asked by adriana on November 30, 2014 
statistics
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours a day? b) In a
asked by adriana on November 30, 2014 
health
What would be the more effective form of sleep? A straight say 8 hours of sleep at night or 7 hours of sleep at night with a few short naps in the day, amounting to 1 hour? Check this site from the National Institute of Health.
asked by hafidz on March 13, 2007 
Probability/Statistics
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers
asked by Amy on July 11, 2009 
Statistics
the average numbers of hours a cat sleep is approximately normally distributed with a mean of 15 hours and a standard deviation of 1.7 hours; what percentage of cats sleep between 13 and 18 hours
asked by Belinda on April 27, 2014 
geometry
The twoway table shows the number of hours of sleep each of 120 student volunteers reported and their exam results. a) Find P(passing test given
asked by jason on May 28, 2016 
math
according to a recent survey 38% of americans get six hours or less of sleep each night. if 75 people are selected to participate in a sleep survey, find the probability that 30 or more of them get six hours of sleep each night
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Economics (37)
According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .7 hours and that the probability distribution is normal. a. What is the probability that a
asked by Mia on May 9, 2014