Identify the level of measurement of the​ data, and explain what is wrong with the given calculation. In a​ survey, the eye colors of respondents are identified as 1 for brown eyes, 2 for blue eyes, 3 for green eyes, and 4 for anything else. The average​ (mean) is calculated for 561 respondents and the result is 1.5.

THE data are at the _______ level of measurement
Choices
Ratio
Ordinal
Intreval
Nominal