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ScotlandStatisticsQuick questions

Data Analysis and Modelling

Quick questions on Continuous random variables and the normal distribution: standardising, sums and approximations - SQA Advanced Higher Statistics

2short 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 q1?
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X∼N(60,16)X\sim N(60, 16). Find P(X<66)P(X<66). [2 marks]
What is q2?
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State the continuity correction you would use to approximate P(X≥30)P(X\ge 30) for a large binomial XX. [1 mark]

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