E1.15: Stevens Experiment to compare notes against a standard (80 Db)
Description
The E1.15 data frame has 10 rows and 3 columns.
Stevens (1956) asked a number of persons to compare notes of
various decibel levels against a standard (80 decibels) and to assign
them a loudness rating with the standard note being a 10. logy is
the response variable and x the stimulus.