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Northern IrelandFurther MathsQuick questions
AS 2 Applied Mathematics
Quick questions on Sampling and data: sampling methods, central tendency and measures of variation - CCEA A-Level Further Maths
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is measures of variation?Show answer
The standard deviation measures the typical distance of values from the mean and is in the same units as the data; the interquartile range measures the spread of the middle 50% and resists outliers.
What is q1?Show answer
Find the mean of . [1 mark]
What is q2?Show answer
Name a sampling method that guarantees each subgroup is represented in proportion to its size. [1 mark]
What is q3?Show answer
For data with , and , find the variance. [2 marks]
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