Question 273723
A sample of 10 observations is selected from a normal population for which the population standard deviation is known to be 5. The sample mean is 19 
(a) The standard error of the mean is 
E = t*s/sqrt(n)
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E = invT(0.97.5,df=9)*5/sqrt(10)
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E = 3.5768
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Cheers,
stan H.