Please compute the following in Rmarkdown (Please prove the code):

16. The following are the cystatin C levels (mg/L) for the patients described in Exercise 15 (A-17). Cystatin C is a cationic basic protein that was investigated for its relationship to GFR levels. In addition, creatinine levels are also given. (Note: Some subjects were measured more than once.) Cystatin C (mg/L) Creatinine (mmoVL) 1.78 4.69 0.35 0.14 2.16 3.78 0.30 0.11 1.82 2.24 0.20 0.09 1.86 4.93 0.17 0.12 1.75 2.71 0.15 0.07 1.83 1.76 0.13 0.12 2.49 2.62 0.14 0.11 1.69 2.61 0.12 0.07 1.85 3.65 0.24 0.10 1.76 2.36 0.16 0.13 1.25 3.25 0.17 0.09 2.01 0.11 0.12 2.06 2.51 0.12 0.06 2.34 Source: Data provided courtesy of D. M. Z. Krieser, M.D. (a) For each variable, compute the mean, median, variance, standard deviation, and coefficient of variation. (b) For each variable, construct a stem-and-leaf display and a box-and-whisker plot. (e) Which set of measurements is more variable, cystatin or creatinine ? On what do you base your answer? 1.50