Mathematics, 03.12.2021 03:30 Emiann222

The average zinc concentrations recovered from a random sample of zinc measurements in 22 different locations was found to be 2.6 grams per milliliter with a variance of 0.09 grams per milliliter squared. Assume that these zinc concentrations are normally distributed. Calculate and interpret a 90% confidence interval for the overall average zinc concentration.

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