Jean researcher is studying the percentage of ethanol in, Ask an Expert

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

a) Calculate the z score for the 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.

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Category:- Statistics and Probability
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