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If a researcher wishes to study the relationship between self-esteem and level of intelligence, then gathering data about participants’ eye color would be __________. a. necessary because it may be an influencing variable in the study b. unnecessary because it does not relate to the topic of the study c. necessary because it may improve the validity of the study d. unnecessary because eye color influences all variables being studied please select the best answer from the choices provided a b c d
Sagot :
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