confidence interval and reporting the upper limit

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Researchers sampled 468 adolescents for a study. The proportion of adolescents in the sample who had ever drank alcohol was 0.28. The estimated standard error of the proportion was 0.04. Calculate the 95% confidence interval for the proportion of adolescents who had ever drank alcohol. Report the upper limit of the confidence interval. Round to the nearest hundredths place (second decimal point). 

Oct 23rd, 2015

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4.07 confidence interval for adolescents who ever drank alcohol. The true population proportion range is 23.93% - 32.07%

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Oct 23rd, 2015

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Oct 23rd, 2015
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Oct 23rd, 2015
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