Question: For the path A B C, if the standard deviations are A = 4, B = 5, and C = 7, what is the standard

For the path A B C, if the standard deviations are A = 4, B = 5, and C = 7, what is the standard deviation of the path?

???? = 42 + 52 + 72 = 16 + 25 + 49 = 90. The standard deviation of A B C is the square root of 90, or 9.48, which we’ll round to 10.

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