Artificial intelligence · University
Mean squared error on three cases · formula reference
Average across the three observations, not only the nonzero errors.
Formula
Average across the three observations, not only the nonzero errors.
MSE = Σ(ŷ−y)²/n
Worked example
Three prediction errors (prediction minus target) are 8, 7, -3. Find mean squared error. Round the final result to 4 decimal places if needed.
Square each error, sum to 122, then divide by 3.
40.6667
Prerequisites and checking
Algebra and the topic definitions. Keep units and rounding consistent. State the model conditions before applying the formula.
Further reading and review references
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