12 Vacation Days During a recent year, working Americans took on average 18.6 vacation days. This survey was based on a random sample of 16 workers. The standard deviation of the sample was 2.3 days. Find the 99% confidence interval for the mean number of vacation days workers took per year. Assume the population is normally distributed. Use The t Distribution Table. Round intermediate answers to at least three decimal places. Round your final answers to the nearest whole number. Continue Q<

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