SOLUTION: The U.S. National Center for Health Statistics collects data on cigarette smokers by sex and age and publishes the results in Vital and Health Statistics. Suppose that a sample of
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Question 269941: The U.S. National Center for Health Statistics collects data on cigarette smokers by sex and age and publishes the results in Vital and Health Statistics. Suppose that a sample of 2760 females who presently smoke has a mean of 40.6 years and a standard deviation of 10.2 years.
Calculate the age value that is 1.90 standard deviations below the mean.
The age value that is 1.90 standard deviations below the mean is? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The U.S. National Center for Health Statistics collects data on cigarette smokers by sex and age and publishes the results in Vital and Health Statistics.
Suppose that a sample of 2760 females who presently smoke has a mean of 40.6 years and a standard deviation of 10.2 years.
Calculate the age value that is 1.90 standard deviations below the mean.
That point has a z-value of -1.90
Find the corresponding x-value:
x = z*s + u
x = -1.90*10.2+40.6
x = 21.22
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The age value that is 1.90 standard deviations below the mean is?
Ans: 21.22
Round up 22 yrs of age
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Cheers,
Stan H.
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