Like I said in the intro, contrast ratio is the difference between the brightest a TV can be, and the dimmest. There are myriad ways to measure light output, but for now we'll go with footlamberts ...

Bruns, William J., Jr. "Introduction to Financial Ratios and Financial Statement Analysis." Harvard Business School Background Note 193-029, August 1992. (Revised September 2004.) ...

Financial ratios are useful tools for investors to better analyze financial results and trends over time. These ratios can also be used to provide key indicators of organizational performance ...

Quantitative: information that can be shown using numbers, figures, ratios, or formulas Qualitative: rather than a quantity of something, it is its quality, standard, or nature In this context ...