
The data consist of eight measurements of hearing loss taken on 100 males, aged 39, who had no indication of hearing difficulties. These measurements are decibel loss (in comparison to a reference standard) at frequencies 500Hz, 1000Hz, 2000Hz and 4000Hz for the left and the right ear, respectively.
data(hearlossC)
Eight Variables, first the ones for ``Left'', than for the ``Right''.
The frequences are abbreviated, e.g., 2k
for 2000 Hz or
5c
for 500 Hz.
The variable names are (in this order)
"Left5c", "Left1k", "Left2k", "Left4k",
"Right5c", "Right1k", "Right2k", "Right4k"
.
Jackson, J.E. (1991) A User's Guide to Principal Components. John Wiley, New York.
data(hearlossC)
symnum(hearlossC)
sca(hearlossC) # -> explains 89.46% instead of 91.62
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