757 prompts matching "IGCSE Maths Y10: Bias in a sample — Practice Set"
Worked example: Solving a quadratic graphically by adding a straight line
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WAEC pitfalls: Giving a graphical answer to more accuracy than the scale allows
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Word problem: A Nigerian transport loading problem as a linear programme
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Worked example: Testing the vertices of the feasible region
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WAEC pitfalls: Ignoring the non-negativity constraints
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Real-life Nigeria: A production mix problem for a small business
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Word problem: Reading the number above a threshold from an ogive
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Worked example: Estimating the median from a cumulative frequency curve
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WAEC pitfalls: Reading the quartiles off the wrong axis
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Real-life Nigeria: Comparing two distributions from their ogives
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Word problem: Comparing the consistency of two Nigerian farmers' yields
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Worked example: The mean deviation of an ungrouped data set
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WAEC pitfalls: Dividing by the wrong number of items
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Real-life Nigeria: Mean deviation set beside standard deviation
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Word problem: Presenting a Nigerian household budget as a pie chart
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Worked example: Reading a quantity from a pie chart given the total
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WAEC pitfalls: Comparing two pie charts of different totals directly
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Word problem: Giving a measured Nigerian market quantity to sensible accuracy
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Worked example: Rounding a number whose leading digits are zeros
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WAEC pitfalls: Dropping trailing zeros that are in fact significant
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