第九章单元测试
- What process does data analysis involve? （ ）
- What kind of data type is the salary? （ ）
- What is/are the appropriate measure(s) for right skewed data? （ ）
- An ideal conversion rate varies among industries. （ ）
- Comparing the outcomes under treatment with those without treatment is a good way for measuring casual effects. （ ）
Which of the following statements is true （ ）。
A:Cleaning data B:Interpreting results C:Reporting the findings D:Gathering data
答案:Cleaning data###Interpreting results###Reporting the findings###Gathering data
A:Ordinal data B:Discrete data C:Nominal data D:Continuous data
A:mode B:median C:mean D:range
A:错 B:对
A:对 B:错
A:Approximately 95% lie within 2 standard deviations B:Approximately 60% of data lie within one standard deviation C:Approximately 97% lie within 3 standard deviations D:Approximately 68% of data lie within 2 standard deviation
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