Question

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 to a particular value is a factor of interest to the researcher. b. the statement is false because a factor that is controlled and set at various levels is a factor of interest to the researcher. c. the statement is false because a factor that is controlled must be set to two levels. d. the statement is true.

Explanation:

Controlled factors, regardless of the number of levels, are of interest to researchers as they are manipulated to observe their effect on the response variable. Randomization helps to account for the impact of uncontrolled factors. For part (a), a factor set to three levels is clearly a factor of interest to the researcher.

Answer:

(a) B. The statement is false because a factor that is controlled and set at various levels is a factor of interest to the researcher.
(b) True (since randomization indeed helps in averaging out the effect of uncontrolled factors on the response variable)