adolescents. After analyeing the results, he ehers determined that the body mass

Question

adolescents. After analyeing the results, he ehers determined that the body mass index of the adolescents who had a high quality sound system in their bedroom was parts (a) through (e) below sgnficartly higher than tust of the adaslescents who dd not have a high quality sound system in their bedroom Compiele (a) Why s this an O A The researchers intertionaly changed an esplanatory variabie of the study C. The researchers tried to inuerce te onome dte sady O D. The researchers observed the behavior of the individuals in the sludy without trying to influence an explanatory variable of the study 6

Explanation / Answer

The researchers didnt tried to apply any treatment to the group.They just analysed the questionaire.

So, its choice D

The researchers observed the behaviour of the individuals in the study without trying to influence an explanatory variable of study

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