Read the example and determine which characteristics best describe the variable in this survey. Farah is surveying people by phone from many different areas throughout the United States. She records their zip codes in order to keep track of what areas the participants are from.

Categorical, Operational, self report.

Explanation:

1. Categorical variable represents the value of a limited and usually fixed number of values such as marital status, gender, etc. This type of variable can take on numeric data e.g 1 for samsung, 2 for iphone. Nonetheless, these numbers don't have mathematical meaning.

2. Operational variable is the specific way a variable is measured. E.g Farah measured the area of participants by using zip codes.

3. Self report variable relies on individual own's report. Variables are revealed by the participants of the survey in order to gain participants responses in observed study.

credit card number 4 is the right answer