大数据基础答案2023秋

第九章测试

1.What process does data analysis involve? （ ）
A:Gathering data B:Interpreting results C:Cleaning data D:Reporting the findings
答案:ABCD
2.What kind of data type is the salary? （ ）
A:Ordinal data B:Discrete data C:Continuous data D:Nominal data 3.What is/are the appropriate measure(s) for right skewed data? （ ）
A:median B:mean C:mode D:range 4.An ideal conversion rate varies among industries. （ ）
A:对 B:错 5. Comparing the outcomes under treatment with those without treatment is a good way for measuring casual effects. （ ）
A:错 B:对 6.

Which of the following statements is true  （  ）。

A:Approximately 97% lie within 3 standard deviations B:Approximately 95% lie within 2 standard deviations C:Approximately 60% of data lie within one standard deviation D:Approximately 68% of data lie within 2 standard deviation