Maintaining your balance may get harder as you grow older.A study was conducted to see how steady the elderly is on their feet.They had the subjects stand on a force platform and have them react to a noise.The force platform then measured how much they swayed forward and backward, and the data is in the table below ("Maintaining balance while," 2013).Do the data show that the elderly sway more than the mean forward sway of younger people, which is 18.125 mm?Test at the 5% level.

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