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AS Unit 2 Applied Mathematics A

Quick questions on Statistical sampling and data presentation - WJEC A-Level 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 are sampling methods?
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Stratified sampling is the one most often calculated: find the sampling fraction sample sizepopulation\dfrac{\text{sample size}}{\text{population}} and apply it to each stratum.
What is q1?
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A factory takes every 50th item off a production line for testing. Name this sampling method. [1 mark]
What is q2?
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A class of 30 has ∑x=1500\sum x = 1500 for a test. Find the mean. [1 mark]
What is q3?
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A histogram class spans 1010 to 2020 with frequency 3535. Find the frequency density. [2 marks]

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