SOLUTION: If the mean and standard deviation of the following data are 5 and 2.1082 respectively, find A and B. 8 , 4 , A , B , 6 , 3 , 3 , 5 , 4.

Question 1109222: If the mean and standard deviation of the following data are
5 and 2.1082 respectively, find A and B.
8 , 4 , A , B , 6 , 3 , 3 , 5 , 4.

Answer by Edwin McCravy(20064) (Show Source): You can put this solution on YOUR website!









We use the shortcut formula for the variance:

























We solve the system:



by substitution and get these two solutions:

A=3.39654, B=8.60346
A=8.60346, B=3.39654

However that's just one solution since it doesn't matter 
which is A and which is B.

Edwin

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