An attribute variable is
A) one that subjects possess at the beginning of a study.
B) an independent variable that is extraneous to the purpose of the study.
C) directly manipulated by the investigator.
D) a and b
E) b and c

Question

Quizplus · Accepted Answer

An attribute variable is a characteristic or trait possessed by subjects at the beginning of a study, such as age, gender, or personality traits. They are not directly manipulated by the investigator and are not extraneous to the purpose of the study. Thus, option A is the correct answer. Option B is incorrect because an attribute variable is not extraneous, and option C is incorrect because attribute variables are not directly manipulated by the investigator. Option D is incorrect because option B is wrong. Option E is incorrect because option C is wrong.

An Attribute Variable Is