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1 Conductor weight â Sag of the conductor is directly proportional to its weight. The weight of the conductors is increased due to ice loading. 2  Span â Sag is directly proportional to the square of the span length. Longer span gives more sag.  Tension -The sag is inversely proportional to the tension in the conductor.
Statistical power is affected by 3 factors: 1  The difference in outcome rates between the two groups. 2  The level of significant difference you are hoping to show (e.g. p p value takes more study power. 3  The frequency of the outcome in the two groups.