Determine whether the following statements are true or false. ​(a) when a factor is controlled by setting it to three​ levels, the particular factor is of no interest to the researcher. ​(b) randomization is used so that those factors not controlled in the experiment​ "average out" their effect on the response variable. ​(this is a reading assessment question. be certain of your answer because you only get one attempt on this​ question.) ​(a) choose the correct answer below. a. the statement is false because a factor that is controlled and set at various levels is a factor of interest to the researcher. b. the statement is false because a factor that is controlled must be set to two levels. c. the statement is false because a factor that is controlled and set to a particular value is a factor of interest to the researcher. d. the statement is true.