PIER HLM course Discussion of HW 1 H . Seltman 5

Problem 1: If you forget to set the variable type for the string variables by adding a dollar sign after those variables on the INPUT statement, they don’t read in, and you get “.” for missing values. If you neglect to make the strings longer than the default 8 characters, two pairs of sessions appear the same because their first 8 letters are the same. The histogram of score shows that people certain values are more common than others; since this is defined as a proportion, the likely cause is that some denominators are more common than others.