Select the variable that illustrates the ratio scale of measurement. (a) gender (b) weight (c) political party affiliation (c) ratings of your supervisor

(b) weight, ratings of your supervisor

Explanation:

Ratio scale is quantitative in nature.and a type of variable measurement. It enables anyone to compare intervals or differences. It is the 4th level of measurement and possesses a zero point.

The weight of a person can be expressed as less between 50 - 60 kgs which is why it  represents a scale of values and considered as ratio scale. Similarly the ratings of supervisor can be in scale of 10. It could be something between 6-10.

However for gender and party affiliation there are one options or limited and it cannot be expressed something in between ranges. So they are not considered ratio scale.

ratio scale of measurements do not have negative values.