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A survey of a random sample of n = 300 undergraduate students in Unisa found tha...
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A survey of a random sample of n = 300 undergraduate students in Unisa found that the mean value of their examination mark was x̄ = 78. Assume that the population standard deviation of the examination mark is σ = R21. Find the 95% confidence limits for the average value of an examination mark by all undergraduate students at Unisa.
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