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VisualizationsApplied Machine Learning

Training-Serving Skew

Pick how the live app prepares a $40 customer for the model. Only the saved training pipeline lands it in the right place, yet no error ever shows.

A live customer spends $40 a month. How does the app prepare that row?

What the model reads (training units)
averagetraininglive$10$15$20$30$40+40, far off the chart$40−2−10+1+2
(40 − 23) ÷ 10.77 = 1.58
training mean 23, training standard deviation 10.77
App log: ✓ no errorsModel reads it as $40 a month

Well above average, as the model learned it. The live customer lands exactly on the $40 training customer.

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