Supervised learning: Which type of machine learning does this describe?
Learning to predict known labels from labeled training examples is supervised learning.
The question
A data science team trains a model on a dataset in which each example already carries a known outcome label, and the model learns to predict that label for new inputs. Which type of machine learning does this describe?
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- Supervised learning, where a model learns a mapping from inputs to known, labeled target outputs. ✓Correct: learning from labeled examples to predict outcomes for new inputs is the definition of supervised learning.
- Unsupervised learning, where a model finds structure or clusters in data lacking target labels.Plausible but wrong: unsupervised learning works on unlabeled data, whereas here labels are present.
- Reinforcement learning, where an agent learns a policy through rewards from interacting with settings.Plausible but wrong: reinforcement learning is driven by reward signals from actions, not fixed labeled examples.
- Transfer learning, where a model reuses knowledge from one task to accelerate a related second task.Plausible but wrong: transfer learning describes reusing prior knowledge, not the labeled-data paradigm itself.
The trap
Selecting reinforcement learning for any predictive model, overlooking that the cue is the presence of labels. How to remember it
Learning to predict known labels from labeled training examples is supervised learning.
How many of these would you get right?
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Every answer, right and wrong, comes with its own explanation.