Worksheet #2 went a lot more smoothly than Worksheet #1, mostly because I know how to work the computer now. This chapter focused on Descriptive Statistics. Descriptive statistics reveal two attributes of a variable: its typical variable (central tendency) and its spread (degree of variation). This chapter also focused a lot on the mean, median, mode, and skewness of variables. The mode is the most common value of the variable, and its used for nominal-level. The median is used for ordinal-level variables, those whose categories can be ranked, its the value of the variable that divides the cases into two equal-size groups. The mean is the sum of all values divided by the number of cases, used for interval-level variables (along with mode and median).