In a survey of 240 students, 85% said they enjoyed the classes they were taking. What is the margin of error for those results? State your answer as a percent rounded to the nearest tenth of a percent, but do not include a % symbol or "+/-" in your response.
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The standard deviation for a proportion is given by: $$ \sigma = \sqrt{\frac{p(1-p)}{n}} $$ where $p$ is the sample proportion and $n$ is the sample size. In this case, $p = 0.85$ and $n = 240$. $$ \sigma = \sqrt{\frac{0.85(1-0.85)}{240}} = \sqrt{\frac{0.85 \times Show more…
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