marketing research:

Indicate whether the following measures use nominal, ordinal, interval, or ratio scale.

• Course grades- A, B, C, D, F

• Whether a respondent has ever been employed

• The color of ones eyes

• IQ score

• Household size

• Zip code of residence

• Children in elementary school are evaluated and classified as nonreaders (0), beginning readers (1), grade-level readers (2), or advanced readers (3).

• The ideal number of children