The Statistic in Statistics is: （）
A. obtained from the data of the population
B. reflection of the statistical characteristics of the population.r
C. an index calculated based on all data of the population
D. obtained after studying all the individuals in the population
E. a statistical indicator calculated based on the sample
查看答案
A Statistic is（）
A. equal to a parameter of the population
B. an exact characteristic of the population
C. an index calculated based on all data of the population
D. obtained after studying all the individuals in the population
E. calculated based on a sample
A researcher measured 50 patients’ weights. There were 13 patients less than 50Kg, and 17 patients over 70Kg, with the rest weighing between 50 and 70Kg. Which type of variable is used by the research
A. quantitative variable
B. categorized variable
C. ordinal variable
D. binary variable
E. nominal variable
将Word文档发送到PowerPoint中演示，下面说法不正确的是______（）
A. Word的内置样式与PowerPoint演示文稿存在对应关系
B. Word内置样式标题一对应演示文稿中的标题
C. Word的文字图片都可发送到演示文稿中
D. 必须添加“发送到Microsoft PowerPoint”按钮到“快速访问工具栏”或功能区
The global financial crisis in 2008 was mainly caused by（）
A. subprime mortgages
B. high-risk financial assets like CDOs
Credit or default crisis
D. Political crisis
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