7.52 Forest management. Forest rangers wanted to better understand the rate of growth for younger trees in the park. They took measurements of a random sample of 50 young trees in 2009 and again measured those same trees in 2019. The data below summarize their measurements, where the heights are in feet: I S n 2009 2019 Differences 24.5 12.5 9.5 50 12.0 3.5 50 7.2 50 Construct a 99% confidence interval for the average growth of (what had been) younger trees in the park over 2009-2019.

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