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Build a 95% confidence interval for the mean of the population from the given sample data. Assume that the population has a normal distribution.

16.4, 15.7, 16.2, 15.8 17.1
15.8, 15.9, 16.0, 16.4 15.0

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Mean
Standard deviation
mean -+ sdv * z/a/2 / sqrt(n))

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