【简答题】男性,38岁,5年前发现HBsAg(+),近2年来数次出现ALT增高,经治疗可恢复,近2个月来出现乏力、纳差。体检:巩膜不黄,亦未见肝掌蜘蛛痣,肝肋下1cm,脾侧位可及。ALT4201 U/L,Tbil20μmol/L,HBsAg(+).诊断考虑为( )A、急性黄疸型肝炎 B、慢性乙型肝炎 C、慢性乙型肝炎肝硬化 D、亚急性重型肝炎 E、慢性重型肝炎 是否应进行抗病毒治疗,依据下列哪一项决定( )...
【判断题】Random error is the
difference between the observed value and the corresponding fitted value.
【判断题】Random error affects the measurement in a constant way and represents stable factors that affect the observed score in the same way each time the measurement is made.
【判断题】Another name for the residual term in a regression equation is random error.
【判断题】目前还没有一套各馆通用的馆藏目录检索系统,各馆都是根据本馆的特点及实际需要来选择管理系统。
【简答题】电机转矩由Tm~Tst,转差率由sm~1期间,转矩T( ), 转速( )
【单选题】Which of the following assumptions concerning the probability distribution of the random error term is stated incorrectly?
A.
The distribution is normal.
B.
The mean of the distribution is 0.
C.
The variance of the distribution increases as X increases.
D.
The errors are independent.
【单选题】The random error in a regression equation
A.
is the predicted error.
B.
includes both positive and negative terms.
C.
will sum to a large positive number.
D.
is used to estimate the accuracy of the slope.
E.
is maximized in a least squares regression model.
【判断题】According to the text, total measurement error is determined by multiplying systematic error with random error.
【单选题】which of the following statement is correct for the random error?A, the occurrence probabilities of large error and small error are equal B, the occurrence probability of negative errors is greater th...