SGrade/A-Level Mathematics/Statistics — Core Methods
Statistics — Core Methods Practice Questions
Statistics covers Statistical sampling, data presentation, probability, binomial distribution, hypothesis testing. These concepts appear in both pure paper 1 and pure paper 2, and form the foundation for all applied mathematics questions.
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Sample questions
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The data values 2, 5, 8, 11, 14 have been coded using y = (x - 8)/3. What is the mean of the coded data?
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Tests understanding of linear transformation properties on measures of central tendency - a core A-Level Statistics skill across all exam boards
A data set has mean 15 and standard deviation 3. What is the coefficient of variation?
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Tests understanding of coefficient of variation as a standardized measure of spread, and ability to apply the formula correctly with basic arithmetic
The correlation coefficient between two variables X and Y is r = 0.8. What is the correlation coefficient between Y and X?
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Tests fundamental understanding of correlation's symmetric property - essential foundation before regression analysis
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