7.3.8 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 table #7.3.10 ("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.
Table #7.3.10: Forward/backward Sway (in mm) of Elderly Subjects
19 30 20 19 29 25 21 24 50