Suppose a researcher is interested in the proportion of students who use public transportation to get to school. A 2015 survey concluded that 17% of students used public transit to get to school. If the researcher wishes to collect a new sample based on the 2015 survey, and to estimate the proportion of students who use public transit to within 3 percentage points with 95% confidence, how many students must be surveyed?
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The researcher wants to estimate the proportion of students who use public transit to within 3 percentage points. This means the margin of error is 3 percentage points. Show more…
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