STAT 1060 Lecture Notes - Lecture 2: Sample Size Determination, Zip Code

• School: Dalhousie University
• Department: Statistics
• Course: STAT 1060
• Professor: Sarhan Ammar

Document Summary

Statistics: art of signs, deals with data, using data to write a statement: collecting, organizing 3. Population: group of individuals we are interested in. Sample: random group of people in population selected. Column (up and down) & row (left to right) The information contains 5 different variables in this example, some variables need units and others don"t: quantitative (numerical) Need units! (e. g. income, age: qualitative (categorical) No units! (e. g. gender, zip code (location), id#) Datum is the singular of data: quantitative: observations of, qualitative: observations of qualitative quantitative variable(s) variable(s) Chapters 3 and 4 : summarizing quantitative data. Example 1: the following observations give the number of minutes that the last 10 customers to call a company waited on hold for technical support over the phone. Sample: 17, 8, 10, 20, 16, 5, 18, 12, 12, 9. Sort data: 5, 8, 9, 10, 12, 12, 16, 17, 18, 20 (not uniformed, different jumps)