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Year 12 Specialist (Unit 3 & 4) Statistical inference

Distribution of the sample mean (CLT)

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Questions
Question 1
197119
Delivery times for a courier form a skewed distribution with standard deviation \(\sigma=15\) minutes. For random samples of \(n=36\) deliveries, find the standard deviation of the sample mean \(\bar X\).
2.5
 (1 d.p) 1 mark

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