1,170 prompts matching "Spot my mistake calculating standard deviation"
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Quiz: The complement of a set within a stated universal set
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Practice: The difference of two sets, A minus B
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Explain Back: The symmetric difference of two sets
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Show All Working: A three-set Venn diagram drawn from a subject survey
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Final Revision: The power set, and how many subsets a set of n elements has
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Learn: Reading a binary operation defined by a formula such as a*b = a + b - ab
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Worked Example: Testing whether a binary operation is closed on a given set
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Quiz: Testing a binary operation for commutativity
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Practice: Testing a binary operation for associativity
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Explain Back: Finding the identity element of a binary operation
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Show All Working: Solving an equation written in terms of a binary operation
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Final Revision: Deciding whether a set under an operation forms a group
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Learn: Simplifying a surd by extracting the largest perfect square
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Worked Example: Collecting like surds in a single sum
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Quiz: Multiplying two surds and simplifying the result
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Practice: Rationalising a denominator of the form root a
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Explain Back: Rationalising a denominator of the form a plus root b using the conjugate
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Show All Working: Expressing a number in the form a root b
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Final Revision: Proving that root 2 is irrational
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Learn: The multiplication and division laws of indices used together
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