题目内容

How old are these houses? When were they(build)?

查看答案

搜索结果不匹配？点我反馈

更多问题

Football is a very popular game. It(play) all over the world.

Stamps(buy) at any post office.

Scientists and clothing designers are working on fashion's next big thing: "." Clothes must or no one will buy and wear them. Scientists need to work with so the clothes are both and .

频数分布的两个重要特征是

A. 统计量与参数
B. 样本均数与总体均数
C. 集中趋势与离散趋势（变异程度）
D. 样本标准差与总体标准差
E. 样本与总体