A lumberyard wanted to do a survey to see if its customers were interested in purchasing
rope along with lumber. Four different groups volunteered to do the study for them. Which
group should do the study so the bias is minimal?

Choose a group to do the study that didn't have any volunteers that worked at the lumberyard, shopped at the lumberyard nor had any family members that shopped or worked there.

Step-by-step explanation:

Since you didn't specify any groups to chose from, I answered in the way that I thought there would be less bias.

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A lumberyard wanted to do a survey to see if its customers were interested in purchasing rope along with lumber. Four different groups volunteered to do the study for them. Which group should do the study so the bias is minimal?

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A lumberyard wanted to do a survey to see if its customers were interested in purchasing
rope along with lumber. Four different groups volunteered to do the study for them. Which
group should do the study so the bias is minimal?