STAB22H3 Chapter 2: STAB22H - Chapter 2 Data Notes

• School: UTSC
• Department: Statistics
• Course: STAB22H3
• Professor: Mahinda Samarakoon

Document Summary

If you can"t answer who and what, you don"t have any useful information. We treat variables in two basic ways, as categorical or quantitative. Categorical variables: identify a category for each case. Usually we think about the counts of cases that fall into each category. Quantitative variables: a variable in which the numbers act as numerical values. Record measurements or amounts of something, they must have units. Data: systematically recorded information, whether numbers or labels, together with its context. Context: the context ideally tells you who was measured. What was measured, and how the data were collected, where the data were collected, and when and why the study was preformed. Data table: an arrangement of data in which each row represents a case and each column represents a variable. Case: a case is an individual about whim or which we have data. Variable: a variable holds information about the same characteristics for many cases.