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10 cards from this deck
An average where values have different importance levels.
Use the formula: x̄ = Σ(wx) / Σw.
The total of each value multiplied by its weight.
Weighted mean = 4.0.
It reflects the importance of different assessments.
Weighted mean = 16.67.
Forgetting to multiply by weights before adding.
80%, 75% respectively.
Weighted mean = (Σ(wx)) / (Σw) where w = weights.
Ensure the total weights add up correctly.
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