两个总体的分布形态，不会影响两独立样本t检验。()

判断题I类错误可能的原因是由于样本数据自身的误导性。()

未分类题According to the federal official, the decline of application for citizenship was caused byA．the increase of citizenship fee.B．unstable economy.C．various reasons.D．the upcoming revisions to the U. S. citizen test.

判断题因接受不同实验处理而造成各组间的差异是组间变异。()

未分类题Which of the following is true according to this passage?A．The illegal immigrants always outnumber the legal ones in the U. S.B．The legal immigrants always outnumber the illegal ones in the U. S.C．There are about 8.5 million illegal immigrants in the U. S.D．Most illegal immigrants come from Latin America.

判断题F检验时要注意区分假设检验是单尾还是双尾的。()