To perform median imputation, follow these steps: 1. Identify the dataset and locate missing values. 2. Calculate the median of the available data for the variable with missing values. 3. Replace each missing value with the calculated median.
For example, if you have the following patient weights: 60, 75, and 80 kg, and a missing value, you would calculate the median (which is 75 kg) and replace the missing value with 75 kg.