An example of a ratio scale variable is _________________.
a. Age group
Page 6 of 12
b. English exam scores
c. Position in the Olympic 100m race
d. Number of children per household

The correct answer is:

d. Number of children per household

A ratio scale variable is characterized by having a meaningful zero point and equal intervals between values, allowing for the calculation of ratios. "Number of children per household" fits this definition because it has a true zero (no children) and the intervals between values (e.g., 1 child, 2 children) are equal and meaningful.

### Do you want details or have any questions?

### Related Questions:
1. What is the main difference between ratio and interval scales?
2. Can you give another example of a ratio scale variable?
3. Why is "age group" not considered a ratio scale variable?
4. How does the ratio scale variable differ from an ordinal scale variable?
5. What are the implications of using a ratio scale for statistical analysis?
6. How do you determine the appropriate scale of measurement for a variable?
7. Can "height" be considered a ratio scale variable? Why or why not?
8. What type of statistical tests are most suitable for ratio scale data?

### Tip:
Remember, ratio scale variables allow for the full range of statistical operations, including addition, subtraction, multiplication, and division.

Explore an example of a ratio scale variable with an explanation. Learn why "Number of children per household" is a ratio scale variable, including its characteristics such as a meaningful zero point and equal intervals. Suitable for advanced learners.

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