DataWhale 統計學一週訓練營 task1

參考：https://www.jianshu.com/p/0bbad96c912a https://github.com/juggkit/statistics_of_Khan/blob/master/1.%E5%9D%87%E5%80%BC_%E4%B8%AD%E4%BD%8D%E6%95%B0_%E4%BC%97%E6%95%B0.ipynb http://www.mogostudy.com/c

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