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Which of the following is a valid formula for calculating the sum of square deviations
I. SS=(sideway) M(x-u)2(power)
II. SS=(sideway) MX2(power)-(MX)2(power over N
III. SS=(sideway) MX2(power-(sidewayMX2(power))over N

A. I only
B. II only
C. I and II
D. II and III only

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