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To examine the relationship between noise exposure and heart disease a study compared a group of people with hearing loss to a group of people without hearing loss The researchers found the percentage of people in the hearing loss group who had heart disease was higher than the percentage for the group that did not have hearing loss This association was particularly strong f workers exposed to loud occupational noise a Is this study an experiment If so what is the explanatory variable and what is the response variable If not explain why it is not an experiment Yes it was an experiment The explanatory variable is heart disease and the response variable is hearing loss OYes it was an experiment The explanatory variable is noise exposure and the response variable is hearing loss Yes it was an experiment The explanatory variable is noise exposure and the response variable is heart disease O No the study is not an experiment because there were no experimental conditions to which study participants were randomly assigned b From this study alone is it reasonable to conclude that noise exposure is the cause of the observed difference in heart disease risk Justify your answer Yes since the effect was stronger for workers exposed to loud occupational noise we may conclude that it has an effect on heart disease Yes since this was an experiment it is reasonable to conclude that noise exposure has an effect on heart disease O No since this was an observational study cause and effect conclusions cannot be drawn No the study does not include people who did not have heart disease and therefore a conclusion cannot be drawn MY

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