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sarahelrod9
sarahelrod9
30.03.2021 • 
Mathematics

Select the correct answer. To determine which window cleaner is most effective, Thad washes half of the windows in his house with one brand and the other half with a
different brand. He then compares the results to draw a conclusion about which cleaner is most effective.
What kind of statistical study did Thad conduct?
A.survey
B.experiment
C.theoretical study
D.observational study

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