Suppose you have a sample size of 50 with a mean 38 and a population standard deviation of 3.3. Based on this, construct a 99% confidence interval for the true population mean.

As in the reading, in your calculations:

--Use z = 1.645 for a 90% confidence interval

--Use z = 2 for a 95% confidence interval

--Use z = 2.576 for a 99% confidence interval.

Give your answers as decimals, to two places

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