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What is the estimated standard error of the mean produce a

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Jane Researcher is studying the percentage of ethanol in DWI arrestees' blood. She tests 16 subjects and finds a mean of 1.8% with a standard deviation of .2%.

a.) Calculate the z score for a subject with an ethanol percentage of 2.0%

b.) What is the (estimated) standard error of the mean?

c.) Produce a 95% confidence interval for the true mean percentage of ethanol in DWI arrestees.

Reference no: EM13629428

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