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Chapter 1: Q. 1 (page 7)

How can we help wood surfaces resist weathering, especially when restoring historic wooden buildings? In a study of this question, researchers prepared wooden panels and then exposed them to the weather. Here are some of the variables recorded: 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).

Identify each variable as categorical or quantitative.

Short Answer

Expert verified

The wood, paint colour and water-repellant are represented as categorical variables and weathering time and paint thickness are represented as quantitative variables.

Step by step solution

01

Categorical variables

Categorical variables are wood, paint colour and water repellent that takes on a limited number of possible values.

02

Quantitative variables

Quantitative variables are the paint thickness and weathering time that is measured on the numerical scale.

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