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A market research company wishes to know how many energy drinks teenagers drink each week. They...

A market research company wishes to know how many energy drinks teenagers drink each week. They want to construct a 80% confidence interval for the mean and are assuming that the population standard deviation for the number of energy drinks consumed each week is 0.9. The study found that for a sample of 369 teenagers the mean number of energy drinks consumed per week is 5.7. Construct the desired confidence interval. Round your answers to one decimal place.

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