1,334 prompts matching "Teach me mean, variance and standard deviation"
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Practice: The parallelogram law of forces
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Spot My Mistake: Compounding three forces acting at one point
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Quiz: Recovering the original force from its two components
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Practice: Choosing the most convenient pair of directions to resolve along
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Quiz: The magnitude of the resultant of several coplanar forces
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Practice: The direction of the resultant of several coplanar forces
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Practice: Why the forces must sum to nought in two perpendicular directions
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Practice: Finding an unknown force from a closed polygon
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Quiz: The coefficient of friction between two surfaces
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Practice: Resolving three forces in two perpendicular directions
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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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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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Spot My Mistake: The probability of exactly r successes in n trials
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Practice: The probability of at least one success
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Quiz: The situations a Poisson distribution models
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Practice: The probability of exactly r events in a Poisson distribution
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