Final answer:
The ratio scale level provides the most information, allowing for ordering, meaningful differences, and the calculation of ratios due to the presence of a true zero point.
Step-by-step explanation:
The level of measurement that provides the most information about a variable is the ratio scale level. Unlike nominal and ordinal levels, ratio data is quantitative and possesses a natural zero point, meaning that you can perform a variety of arithmetic operations including calculating ratios and making meaningful comparisons both in terms of differences and relative sizes. For instance, if you have exam scores of 20, 68, 80, and 92, you can say that a score of 80 is 60 points higher than a score of 20, and it is also four times as much.
Interval data is ordered and the differences between values are meaningful, but it does not have a true zero point. Ordinal data can be ordered but the differences are not meaningful while nominal data is simply about categorization without any order or meaningful differences.