Math Problem Statement
Proportion of students that need external exams is 64%.determine the approximate 90% confidence interval if the sample size was 100
Solution
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Math Problem Analysis
Mathematical Concepts
Statistics
Confidence Intervals
Proportions
Formulas
Confidence Interval Formula: \hat{p} \pm z \sqrt{\frac{\hat{p}(1 - \hat{p})}{n}}
Standard Error Formula: SE = \sqrt{\frac{\hat{p}(1 - \hat{p})}{n}}
Margin of Error Formula: ME = z \times SE
Theorems
Central Limit Theorem
Suitable Grade Level
Grades 11-12
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