Overview
Hello again, please help me use ratio estimator to analyze the bodyfat dataset. Please use R to randomly pick 30 samples from the dataset, and use ratio estimator to anaylze it. Needed document are provided below ( including dataset and powerpoint about the ratio estimation). Thank you. The exposure is weight, and outcome is bodyfat. (Use weight to estimate the body-fat mean, and compare the estimated body-fat mean with the original body-fat mean)