1,326 prompts matching "WAEC question on measures of dispersion"
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Practice: What a singular coefficient matrix says about the equations
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Quiz: Solving three simultaneous equations with the inverse matrix
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Practice: Comparing the inverse method with elimination for three equations
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Learn: Converting a weight given in kilogram-force into newtons
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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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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Explain Back: The forces acting on a body hanging from two strings
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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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Practice: Limiting friction, and the greatest value it can reach
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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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Explain Back: A probability distribution table for a discrete random variable
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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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Quiz: The situations a Poisson distribution models
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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Explain Back: Converting a value to a z-score
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Spot My Mistake: When the normal distribution may approximate the binomial
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