Question

The 2007 NBI data were analyzed and the results made available oat the FHWA Web site. Using the FHWA inspection rations, each of the 599,766 highway bridges in the United States was categorized as structurally deficient, functionally obsolete, or safe. About 12% of the bridges were found to be structurally deficient, while 13.5% were functionally obsolete.
a. What is the variable of interest to the researchers?
b. Is the variable of part a quantitative or qualitative?
c. Is the data set analyzed a population or a sample?

Answer 1

Answer:

Bridges

Qualitative

Population

Explanation:

Given that :

A.) The variable of interest to the researcher which he aims to analyse are the bridges in the United States categorizing them into structurally deficient and safe.

B.) The variable is Qualitative in nature as it aims to analyze the state and condition of bridges in the United States Dividing them into categories depending on the nature or type of their deficiency.

C.) The data used is a population and not a sample because it takes into consideration all the entire bridges in the United States and not a subset of the available bridges.