【单选题】As a general rule, the normal distribution is used to approximate the sampling distribution of the sample mean only if
A.
the sample size n is sufficiently large
B.
the sample mean is close to 0.50.
C.
the underlying population is normal
D.
np and n (1 – p ) are both greater than 5
【判断题】As a general rule, the normal distribution is used to approximate the sampling distribution of the sample proportion only if the sample size n is greater than or equal to 30.
【判断题】( )三相负载三角形连接的电路,线电流是指流过相线中的电流。
【判断题】负载三角形连接的电路中线电流是相电流的 倍
【多选题】我们想事情,做工作,想得对不对,做得好不好,根本的衡量尺度,就是人民( )。
【单选题】在封建社会,每三年一次,在各省省城举行的考试中,考中者称
【简答题】[奶酒] 最早产于草原地区,而传统奶酒的酿制主要采用“ ”
【单选题】剪力墙在偏心受压时的斜截面受剪承载力,[ ]压力使得抗剪能力提高的那部分影响。