A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ().
来源:考试资料网2019-12-08
对全国各铁路交通枢纽的货运量、货物种类等进行调查,以了解全国铁路货运概况。这种调查属于()
来源:考试资料网2021-10-09
某厂某年职工劳动生产率为20000元,是历史最高水平的1.2倍。这里的1.2倍是()
来源:考试资料网2021-10-09
如果居民按报告期价格购买商品需多支出40万元,报告期商品销售额为200万元,则价格指数为()
来源:考试资料网2021-10-09
The number of class intervals in a frequency distribution is usually between ().
来源:考试资料网2019-12-08