OpenStax, Statistics §8.3 A Population Proportion · Try It 4 · Statistics · Confidence intervals
A Population Proportion · Try It 4
Out of a random sample of 65 freshmen at State University, 31 students have declared their majors. Use the plus-four method to find a 96 percent confidence interval for the true proportion of freshmen at State University who have declared their majors.
OpenStax, Statistics · §8.3 A Population Proportion · Try It 4
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