Question: Let's say that we want to build recommendation systems based on Rating Matrix 1 and Rating Matrix 2 . Which similarity measure would be more

Let's say that we want to build recommendation systems based on Rating Matrix 1 and Rating Matrix 2.
Which similarity measure would be more appropriate for Rating Matrix 1?
(Hint: Check all users use similar scales or dissimilar scales)
Let's say that we want to build recommendation

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