Question

Protecting woodWhat measures can be taken, especially when restoring historic wooden buildings, to help wood surfaces resist weathering? In a study of this question, researchers prepared wooden panels and then exposed them to the weather. Some of the variables recorded were type of wood (yellow poplar, pine, cedar); type of water repellent (solvent based, water-based); paint thickness (millimeters); paint color (white, gray, light blue); weathering time (months). Classify each variable as categorical or quantitative.

Short answer

Categorical variable: Type of wood, paint color, and type of water repellant.

Quantitative variable: Paint thickness and weathering time.

Step-by-step solution

Step 1. Given information.

The given statement is:

Researchers created wooden panels and then exposed them to the elements in order to investigate this subject.

Step 2. Classify each variable in either categorical or quantitative.

A categorical variable assigns a description to each individual, that categorizes them into one of the numerous groups.

Therefore, it will include the type of wood, paint color, and type of water repellant.

A quantitative variable is a set of numerical values that count or measure some aspect of each person.

Therefore, it will include paint thickness which will be measured in millimeters and weathering time which will be measured in hours.