Quote:
Originally Posted by ArtieSwimsOn
I am back to thinking math is evil.
Cannot understand how to find the mean and standard deviation with two X values and their corresponding z scores. Asking boss today for half a day off to go to tutoring center again. Feel so stupid!
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X1 = z1 * sigma + mu
X2 = z2 * sigma + mu
X1, X2, z1, z2 are known. Solve for sigma and mu.
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