An experiment is designed to determine how speaker size affects loudness. The researcher measures loudness of 30 speakers randomly. The speakers are small, medium and large. The loudness is measured by decibels and range from 20.3 decibels to 30.5 decibels.
a) Identify the IV and its levels
b) Identify type of variable for the IV.
c) Identify the DV.
d) What type of variable is the DV?
