单项选择题
A.观测变量 B.控制变量 C.观测变量的水平 D.控制变量的水平
A.Analyze→Compare Means→Means B.Analyze→Compare Means→One-Samples T Test C.Analyze→Compare Means→Independent-Samples T Test D.Analyze→Compare Means→One-Way ANOVA
A.一个 B.二个 C.三个 D.四个
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