Explanation : Supervised learning asks the machine to learn from our data when we specify a target variable.
This reduces the machine's task to only divining some pattern from the input data to get the target variable.
In unsupervised learning we don't have a target variable as we did in classification
and regression.
Instead of telling the machine Predict Y for our data X> we're asking What can you
tell me about X?
Things we ask the machine to tell us about
X may be What are the six best groups we can make out of X? or What three
features occur together most frequently in X?
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