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4 Unit A2 2: Applied Mathematics (A-level only)

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Question 355

A random sample of size nnn is taken from a population that is normally distributed with mean 252525 and standard deviation 444. Find the minimum sample size such that the probability of the sample mean being greater than 27.527.527.5 is less than 1%1\%1%.

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4 Unit A2 2: Applied Mathematics (A-level only) Questions

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