We use statistics to describe events in the past or expectations about the future, and the financial calculator provides valuable shortcuts for performing various statistical calculations, such as means, standard deviations, and regression parameters. When calculating statistics from data, it is important to recognize when you are working with a population or a sample. In general, a means you are working with all possible outcomes/ realizations, while a means you are working with a subset. Entering Statistical Data If you are entering one variable list, type each value and press + The L + key adds values to a running list. If there are two variables, enter the independent variable, press INPUT, enter the dependent variable, and press +. In the following example, the market return is the independent variable (x) and Teldar's return is the dependent variable (Y)--when you learn about risk and return, you will understand why. Market Teldar Year 1 129 2 18 31 3 -12 -3 8 4 21 5 14 2