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dhorak3024 Group Title

The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are thought to be normally distributed with mean μ and standard deviation σ = 10. A simple random sample of 25 children from this population is taken and each is given the WISC. The mean of the 25 scores is x =104.32 . Find a 80% confidence interval for μ.

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