nerdexam
Microsoft

AI-900 · Question #143

You create a regression model with low RMSE and review the best model metrics. Where on the Residual histogram should the most frequently occurring residual values cluster for your model?

The correct answer is C. 0. For a good regression model with a low RMSE, the most frequently occurring residual values should cluster around zero on a residual histogram.

Submitted by kevin_r· Mar 30, 2026Describe fundamental principles of machine learning on Azure

Question

You create a regression model with low RMSE and review the best model metrics. Where on the Residual histogram should the most frequently occurring residual values cluster for your model?

Options

  • A1
  • B0.5
  • C0
  • D-1
  • E2
  • F-0.5

How the community answered

(43 responses)
  • B
    2% (1)
  • C
    93% (40)
  • E
    5% (2)

Why each option

For a good regression model with a low RMSE, the most frequently occurring residual values should cluster around zero on a residual histogram.

A1

Residuals clustering around 1 would indicate a systematic positive bias in the predictions, meaning the model consistently underestimates the actual values by approximately one unit.

B0.5

Residuals clustering around 0.5 would indicate a systematic positive bias, where the model consistently underestimates the actual values by about 0.5 units.

C0Correct

In a well-performing regression model with low Root Mean Squared Error (RMSE), the residuals, which are the differences between predicted and actual values, should ideally be small and randomly distributed around zero, indicating accurate predictions without systematic bias.

D-1

Residuals clustering around -1 would indicate a systematic negative bias in the predictions, meaning the model consistently overestimates the actual values by approximately one unit.

E2

Residuals clustering around 2 would indicate a significant systematic positive bias, where the model consistently underestimates the actual values by approximately two units.

F-0.5

Residuals clustering around -0.5 would indicate a systematic negative bias, where the model consistently overestimates the actual values by about 0.5 units.

Concept tested: Regression model residual analysis

Source: https://learn.microsoft.com/en-us/azure/machine-learning/how-to-interpret-model-visualizations

Topics

#Regression models#Residual analysis#Model evaluation

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