计算描述性的统计 Frequency table、scatter plots(散点座标图) 、 Cross table、mean value、standard deviation( 标准差) Frequency table： 可用来检查遗漏值的百分比，是否太高。
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Ranked scatter plots 分级排序散点图
It seems to have more data points embedded in its scatter plots than our galaxy has stars.
这看起来就是把数据要点嵌入散点图里，如同我们的银河系遍布繁星一般。
It would also be desirable to display scatter plots and line plots of this data in GIF, JPEG, or PNG format.
它也适合于用GIF、jpeg或png格式显示这些数据的分布图(scatter plot)或线图(line plot)。
The questions associated with these format measure skills such as graph reading, interpretation of scatter plots, and interpretation of information presented in tables.
以这种形式出现的问题用来考查学生诸如图表阅读、解释散点图和信息图表的技能。
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