Subjective preference data on soap pads

Abstract

Table N.1 gives data obtained during the development of a soap pad. The factors, amount of detergent, d, coarseness of pad, c, and solubility of detergent, s, were each set at two levels. There were 32 judges and the experiment was done on two days. Each judge attached a score (excellent = 1, ... , poor = 5) to two differently formulated pads on each of two days. For the data and several different analyses, see Johnson (1967).