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7. The Boston data set is a built-in dataset in the MASS library of R. Assume the variable medv in the Boston data set is

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7. The "Boston" data set is a built-in dataset in the "MASS" library of R. Assume the variable "medv" in the Boston data set is approximately normally distributed. Treating the data as a sample from a larger normal population, find 95% confidence intervals for the variance of "medv"

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