【单选题】用样本均数估计总体均数的可靠性大小时所选用的指标是().
【单选题】绘制机械图样时,用以表达零件不可见轮廓线的线型为( )。
【判断题】The geometric mean is a measure of variation or dispersion in a set of data.
【单选题】Set is a measure of?/ 定型是对下列哪项性能的测试?
A.
The extensibility of a wool fibre 羊毛纤维的延伸性
B.
The stability of the new shape of a deformed wool fibre 羊毛纤维变形后,在新的形状下的稳定性
C.
The strength of a wool fibre 羊毛纤维的强力
D.
The elongation of a wool fibre 羊毛纤维的伸长
【判断题】网络文献调研是利用互联网收集第手数据的调研方法,也称为网络文献法。
【判断题】The interquartile range is a measure of variation or dispersion in a set of data.
【判断题】The interquartile range is a measure of central tendency in a set of data.