Levels of Measurement

What is a key characteristic of nominal data?

• The numbers represent a rank order.

• The differences between values are meaningful.

• Numbers are just labels for categories.

• It has a true zero point.

Which of the following is an example of ordinal data?

• The colors of t-shirts (yellow, green, blue).

• The number of pairs of shoes a person owns.

• Movie ratings on a scale of 1 to 10.

• The height of individuals in centimeters.

What is a limitation when performing arithmetic with ordinal data?

• You can only add values, not subtract.

• The numbers can be ranked, but meaningful arithmetic operations like addition or subtraction are not valid.

• Only multiplication and division are allowed.

• The data must be converted to nominal first.

What distinguishes interval data from ordinal data?

• Interval data allows for meaningful arithmetic operations on the differences between values.

• Interval data has a true zero point, unlike ordinal data.

• Interval data is always categorical, while ordinal data is numerical.

• Interval data only allows for ranking, similar to ordinal data.