Statistics

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Statistics

  1. 1. Statistics note
  2. 2. Software can’t think for you•
  3. 3. Pie Charts• 片slice大,说明频率frequency高
  4. 4. Bar Charts
  5. 5. Histogram• 跟bar charts不一样:无间隙
  6. 6. cumulative frequency 积累频率• 不停累积数值
  7. 7. 趋势
  8. 8. Mean 平均值•
  9. 9. • outliers 异常值
  10. 10. Finding the median 找中位线• 方法:排序,找中间值
  11. 11. mean and median exercise• If you had to pick one age to represent this class, what would it be? Why? – 两个不同的年龄段,不能只用一个数值来表示• What if you could pick two ages instead? Which two ages would you pick, and why? – 2和32
  12. 12. mode• 频率最高的叫mode

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