Question: 7) The formula for computing standard deviation of sample observations is: a ) o Ex2 - (Ex) n(n - 1) b)o nEx - (Ex)2 n(n

7) The formula for computing standard deviation of sample observations is:

7) The formula for computing standard deviation of sample observations is: a ) o Ex2 - (Ex) n(n - 1) b)o nEx - (Ex)2 n(n - 1) c) O nEx- (Ex) 2 n - 1 d) o Ex2 - (nEx)2 n(n - 1)

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