- #1
zmike
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Homework Statement
Calculate the following:xbar
where P(Mu > xbar) = 0.025, df = 20, Muxbar = 39.4, sigmaxbar = 28.7
Homework Equations
t = (xbar - mu)/(s/sqrt n)
The Attempt at a Solution
I know that I can plug muxbar, t =2.086 using my table but I don't know about s.
muxbar is the mean of the samples so do I use the sigmaxbar since it's the SD of the mean of the samples? Is that the same as s?
WHAT IS the difference between muxbar and mu and xbar?
thanks
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