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A-LEVEL MATHEMATICS STATISTICS DEFINITIONS (EDEXCEL) QUESTIONS WITH COMPLETE ANSWERS

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A-LEVEL MATHEMATICS STATISTICS DEFINITIONS (EDEXCEL) QUESTIONS WITH COMPLETE ANSWERS

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A straight line, expressed in the form y = a + bx , calculated to minimise the sum of the
squares of the residuals


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Regression line

, Adjusting the values of discrete variables to their upper and lower bounds when
approximating with a continuous distribution such as the normal distribution


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Continuity correction




This variable is observed/ measured by the researcher and is usually plotted on the y
axis of a scatter graph (and is represented by y in a regression equation)


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Response (dependent) variable




The set of all possible outcomes


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Sample space




Non-random sampling technique in which a sample is chosen by the researcher to
represent the characteristics of the whole population


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