Alex and Jennifer conducted an experiment to test reaction times in grabbing a meter stick after it is dropped. They each lested friends. Alex dropped the meter stick for his friends and Jennifer dropped the meter stick for her friends while the other one timed
the reactions. Jennifer's friends reacted, on average, 0.9 seconds faster than Alex's friends. Jennifer concluded that her friends
were faster
Which of the following should she do next to check her results?
Try a different reaction time experiment.
Try the experiment again, this time using a ruler instead of a meter stick.
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Repeat the experiment as it was done the first time but using only Jennifer's friends.
Repeat the experiment and have one person drop the meter stick for all the friends tested.