Math — Confidence Intervals
Confidence intervals for a mean and a proportion.
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\bar{x} \pm z^*\frac{\sigma}{\sqrt{n}}
\bar{x} \pm t^*\frac{s}{\sqrt{n}}
\hat{p} \pm z^*\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}
\text{95\% CI} \Rightarrow z^* = 1.96