Question

multiple choice question
which of the following variables is recorded at the interval level of measurement?
a mans shoe size.
a students class rank.
the publisher of a textbook.
number of patients visiting the er today.

Explanation:

Interval-level measurement has ordered categories with equal, meaningful intervals between values, but no true zero point.

• Shoe size: Has ordered values with consistent intervals (e.g., difference between size 8 and 9 is the same as 9 and 10) and no true zero (a size 0 does not mean "no foot size").
• Student's class rank: Is ordinal (only orders, intervals are not equal).
• Textbook publisher: Is nominal (categorical with no order).
• Number of ER patients: Is ratio (has a true zero, meaning 0 patients equals no patients).

Answer:

A. A man's shoe size.