ECON 2500 Lecture Notes - Honda Insight, Quartile, Categorical Variable

• School: York University
• Department: Economics
• Course: ECON 2500
• Professor: all

Document Summary

Econ 2500 winter 2011 xianghong li. Chapter 1 looking at data distributions jan 4. Context of a data set, purpose of it. Unit of measurement, e. g. - categorical variable: places an individual into one of several groups or hourly wage in dollars. categories. Not all observations (observed values of the variables) are the same variation. The pattern of variation of a variable is called its distribution. Distribution is a summary of the values a variable takes and how often it takes the different values. Sort observations and rank them from the smallest to the largest. Write down the stems according to the range of the data. Make a summary table (counts and percent): choose counts for small data sets, choose percent for large data sets. Interval choice: your judgement, choose the one show, the overall pattern best. Deviations from the overall pattern, especially outliers. Symmetric: mirror images on each side of the midpoint (think of a stemplot).