A study was conducted to test the effectiveness of Seeing Eye Dogs. People with different ranges of vision loss were included in the study. Which question would help in determining whether the conclusion above is valid?
A
What was the average age of the people in the study?
BWhat was the most common occupation of people in the study?
CHow many people in the study had a pet?
DHow many people in the study had hearing problems?
A
BWhat was the most common occupation of people in the study?
CHow many people in the study had a pet?
DHow many people in the study had hearing problems?