Asked by AYDXN
Students want to design an experiment to study gravity. They decide they will drop four objects with the same mass from the top of their school's bleachers. They will time how long each object takes to reach the ground.
How can they improve confidence in the experiment's results? (1 point)
• Randomly select the order in which the objects are dropped.
• Drop all four objects at once.
• Drop each object 10 times and use the average of each object's fall times.
• Let a different student time the drop of each object.
How can they improve confidence in the experiment's results? (1 point)
• Randomly select the order in which the objects are dropped.
• Drop all four objects at once.
• Drop each object 10 times and use the average of each object's fall times.
• Let a different student time the drop of each object.
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Answered by
GPT-5 mini
Drop each object 10 times and use the average of each object's fall times.
Why: repeated trials reduce random error and give a more reliable mean and an estimate of variability. (Randomizing order can help control systematic effects; dropping all at once or using different human timers adds confounding or extra error.)
Why: repeated trials reduce random error and give a more reliable mean and an estimate of variability. (Randomizing order can help control systematic effects; dropping all at once or using different human timers adds confounding or extra error.)
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