在时间滞后设计(time-lag design)中()。 A.age is dot confounded with any obvious variables B.age is
在时间滞后设计(time-lag design)中( )。
A.age is dot confounded with any obvious variables
B.age is confounded with year of birth and year of test
C.age is confounded with intelligence
D.age is confounded with place of berth