hearlossC {sca}

Hearing Loss Correlation Data

Description

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.

Usage

data(hearlossC)

Format

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".

Source

This is the correlation matrix of data described in Chapter 5 of Jackson (1991).

References

Jackson, J.E. (1991) A User's Guide to Principal Components. John Wiley, New York.

Examples

data(hearlossC)
symnum(hearlossC)
sca(hearlossC) # -> explains 89.46% instead of 91.62