$$\text{Point Estimate} \pm (\text{Critical Value}) \times (\text{Standard Error})$$
$$\text{Mean (}\mu\text{), }\sigma\text{ unknown: } \bar{x} \pm t^* \left(\frac{s}{\sqrt{n}}\right), \quad df = n - 1$$
$$\text{Proportion (}p\text{): } \hat{p} \pm z^* \sqrt{\frac{\hat{p}(1-\hat{p})}{n}}$$