单项选择题
Last year China’s saving rate was 54 percent of GDP, according to China Daily. The U.S. rate, including households and corporations, was a mere 12 percent of GDP. What kind of statistics are used in the statement. A、Single statisticsB、Multiple statisticsC、Various statisticsD、none of the above
未知题型 执行以下程序的输出结果是_[18]_______
单项选择题 亚非家和地区第一次在没有殖民国家参加的情况下召开的会议是（）
判断题 参数估计和假设检验都属于推断统计的内容，都是利用样本对总体进行某种推断，只不过推断的角度和方法不同。（ ）
