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foreword
公司内部招募数据分析团队：
This set of questions is specially selected to test the learning attitude and ability of the participating students.
2. Question set
first question
The measurement results of serum total cholesterol in 101 healthy men in a certain place are as follows, please calculate the mean, standard deviation, coefficient of variation, and median.
Reference data:
4.77 3.37 6.14 3.95 3.56 4.23 4.31 4.71 5.69 4.12 4.56 4.37 5.39 6.30 5.21 7.22 5.54 3.93 5.21 4.12 5.18 5.77 4.79 5. 12 5.20 5.10 4.70 4.74 3.50 4.69 4.38 4.89 6.25 5.32 4.50 4.63 3.61 4.44 4.43 4.25 4.03 5.85 4.09 3.35 4.08 4.79 5.30 4.97 3.18 3.97 5.16 5.10 5.86 4.79 5.34 4.24 4.32 4.77 6.36 6.38 4.88 5.55 3.04 4.55 3.35 4.87 4.17 5.85 5.16 5.09 4.52 4 .38 4.31