which is better data collection or curve fitting? which is the best way to test interest level? why use sparse data how to measure attractiveness what is the most accurate way to collect data? which curve is the best for the attractiveness of a credit card as a function of the interest rate? what should the interest rate range be what is the appropriate rate range for curve fitting what is the optimal data collection for curve fitting how to fit the attractiveness of a credit card what is the difference between dense data collection and deep data collection how do you measure attractiveness what is the best method to test interest rate what is the interest rate range used for in the curve fitting why is it better to collect less data at each interest level what is the best range to measure attractiveness why use deep sparse data how many data points is a typical interest rate curve what is the best test for using a curve how to use a sparse vs dense analysis