Mathematics, 30.03.2021 21:30, imstoopid69
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
Answers: 3
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