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 (mmol/L) 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 1.50 2.01 0.11 0.12 2.06 2.51 0.12 0.06
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 (mmol/L)
| 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 |
| 1.50 | 2.01 | 0.11 | 0.12 |
| 2.06 | 2.51 | 0.12 | 0.06 |
2.34
Source: D. M. Z. Krieser, M.D. Used with permission.
(a) For each variable, compute the
variation.
(b) For each variable, construct a stem-and-leaf display and a box-and-whisker plot.
(c) Which set of measurements is more variable, cystatin C or creatinine? On what do you base
your answer?
that question from this book BIOSTATISTICS
A Foundation for Analysis
in the Health Sciences
chapter 2 question 16
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