Which of the following is not a level of measurement in statistics?

• A. $\mathrm{Fractional}$
• B. $\mathrm{Nominal}$
• C. $\mathrm{Ordinal}$
• D. $\mathrm{Ratio}$

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the concept of 'levels of measurement' in statistics. These levels describe the nature of data and how it can be measured or categorized.
2. Step 2: Recall the four commonly recognized levels of measurement: Nominal, Ordinal, Interval, and Ratio.
3. Step 3: Review each option given: Nominal (categorical data without order), Ordinal (categorical data with order), Ratio (numerical data with a true zero point), and Fractional.
4. Step 4: Identify that 'Fractional' is not a standard level of measurement in statistics; it is not part of the established classification.
5. Step 5: Conclude that the correct answer is 'Fractional' because it does not represent a recognized level of measurement.