1,041 prompts matching "Create a revision plan for measures of dispersion"
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Spot My Mistake: Multiplying a 3 by 3 matrix by a 3 by 1 column
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Spot My Mistake: Orders that make a product possible one way round but not the other
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Spot My Mistake: A symmetric matrix, equal to its own transpose
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Practice: A diagonal matrix
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Learn: Deciding whether a stated matrix calculation is possible at all
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Practice: Evaluating AB minus BA
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Learn: Solving two simultaneous equations by Cramer's rule
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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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Spot My Mistake: Why the inverse must be applied on the correct side
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Practice: What a singular coefficient matrix says about the equations
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Learn: Choosing the point about which to take moments
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Practice: Limiting friction, and the greatest value it can reach
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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Practice: Using a binomial expansion to approximate a number
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Learn: Finding lambda from a stated mean
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Spot My Mistake: Reading a probability from the standard normal table
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Learn: The probability that a normal variable lies between two values
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